SOF NSO — older updates
Every cycle of news + important dates we've captured for SOF National Science Olympiad, oldest cycles at the bottom. Live information is on the main exam page; this archive preserves what each previous cycle officially announced.
Older news (62)
SOF confirmed three exam date options for NSO Level 1: October 30, November 19, and December 3, 2026. Schools can select one date to conduct the exam as per their convenience.
Read full notice →Archived 2 Sept 2026
<cite index="7-1,7-10">Second-level exam dates will be announced by December 2026, tentatively scheduled for the 2nd or 3rd Sunday of February 2027 for Classes 3 to 12.</cite>
Read full notice →Archived 31 Aug 2026
Students can register for NSO 2026-27 through their schools. Registration must be completed at least 30 days before the chosen exam date with a fee of Rs 170 per student.
Read full notice →Archived 2 Sept 2026
SOF has announced that Level 2 exam dates for ISO, IMO, and IEO will be declared by December 2026, tentatively scheduled for the 2nd or 3rd Sunday of February 2027.
Read full notice →Archived 6 Sept 2026
SOF has announced three exam dates for ISO Level 1 2026-27: October 30, November 19, and December 3, 2026. Schools can select one date for conducting the exam.
Read full notice →Archived 1 Sept 2026
Science Olympiad Foundation has dispatched registration prospectuses to schools for the 2026-27 academic year. Schools must submit registrations at least 30 days before their chosen exam date.
Read full notice →Archived 28 Aug 2026
Sample papers for ISO 2026-27 released
13 Aug 2026SOF has released sample question papers for the ISO 2026-27 exam in PDF format to help students familiarize themselves with the exam pattern and prepare effectively.
Read full notice →Archived 8 Sept 2026
Science Olympiad Foundation has announced Level 1 exam dates for NSO 2026-27 as October 30, November 19, and December 3, 2026. Schools must choose one date and register students at least 30 days before the selected exam date.
Read full notice →Archived 27 Aug 2026
<cite index="5-1,6-2">NSO (now called ISO) Level 1 exams scheduled for October 30, November 19, and December 3, 2026. Schools may choose one date for conducting the exam, with separate question papers for each date.</cite>
Read full notice →Archived 31 Aug 2026
<cite index="5-5,5-6">The Olympiad registration 2026 forms have been dispatched to schools. Schools that have not received registration forms can write to info@sofworld.org.</cite>
Read full notice →Archived 31 Aug 2026
SOF announced NSO Level 1 exam dates for 2026-27: October 30, November 19, and December 3, 2026. Schools can choose one date to conduct the exam.
Read full notice →Archived 28 Aug 2026
SOF has released the official exam schedule for NSO 2026-27 with Level 1 exams scheduled for October 30, November 19, and December 3, 2026. Schools can select one date to conduct the exam and must register students at least 30 days before.
Read full notice →Archived 26 Aug 2026
SOF has announced three exam dates for ISO Level 1: October 30, November 19, and December 3, 2026. Schools can select one date as per their convenience.
Read full notice →Archived 8 Sept 2026
SOF has opened online registration for the 2026-27 session. Students must register through their schools at least 30 days before their chosen exam date.
Read full notice →Archived 3 Sept 2026
Second-level exams for ISO will be held tentatively on 2nd or 3rd Sunday of February 2027 for qualifying students from classes 3-12. Official announcement expected by December 2026.
Read full notice →Archived 10 Sept 2026
Registration forms for 2026-27 have been dispatched to schools. Schools must register at least 30 days before their chosen exam date from three available options in October-December 2026.
Read full notice →Archived 10 Sept 2026
Science Olympiad Foundation released the NSO Level 2 results for the 2025-26 cycle in March 2026. Students who qualified from Level 1 appeared for Level 2 exams held on February 8 and 15, 2026.
Read full notice →Archived 7 Sept 2026
SOF has opened online registration for schools and individual students for the 2026-27 Olympiad exams. Schools must register at least 30 days before their chosen exam date.
Read full notice →Archived 6 Sept 2026
SOF confirmed that NSO Level 2 exam dates will be announced by December 2026, tentatively scheduled for the 2nd or 3rd Sunday of February 2027 for students qualifying from Level 1.
Read full notice →Archived 27 Aug 2026
The Science Olympiad Foundation confirmed that Level 2 exam dates for NSO 2026-27 will be announced by December 2026. The exam is tentatively scheduled for the second or third Sunday of February 2027 for qualifying students from Classes 3 to 12.
Read full notice →Archived 23 Aug 2026
SOF has opened online and school-based registration for the 2026-27 olympiad cycle. Schools must register students at least 30 days before their chosen exam date.
Read full notice →Archived 5 Sept 2026
SOF has dispatched Olympiad registration forms to schools for the 2026-27 academic year. Schools not receiving forms can contact info@sofworld.org for prospectus and registration materials.
Read full notice →Archived 27 Aug 2026
Science Olympiad Foundation has announced three exam dates for NSO Level 1: October 30, November 19, and December 3, 2026. Schools will select one date for conducting the examination.
Read full notice →Archived 4 Sept 2026
SOF has announced three exam dates for ISO (formerly NSO) Level 1: October 30, November 19, and December 3, 2026. Schools can choose any one date as per their convenience.
Read full notice →Archived 3 Sept 2026
SOF has dispatched registration forms for all 2026-27 Olympiad exams including NSO to participating schools. Schools that haven't received forms can request them at info@sofworld.org.
Read full notice →Archived 26 Aug 2026
SOF has rebranded the National Science Olympiad as International Science Olympiad (ISO) starting 2026-27. The exam follows the same format and is conducted for classes 1-12.
Read full notice →Archived 10 Sept 2026
Science Olympiad Foundation has dispatched registration forms for the 2026-27 session to all registered schools. Schools must submit registrations at least 30 days before their chosen exam date.
Read full notice →Archived 4 Sept 2026
The Science Olympiad Foundation has released the NSO Level 1 exam schedule for 2026-27. Schools can choose from three dates: October 30, November 19, or December 3, 2026. Registration must be submitted at least 30 days before the chosen exam date.
Read full notice →Archived 23 Aug 2026
The Science Olympiad Foundation renamed the National Science Olympiad to International Science Olympiad starting from the 2026-27 academic year. The exam format and structure remain similar with Level 1 and Level 2 stages.
Read full notice →Archived 1 Sept 2026
SOF has dispatched registration forms to schools for the 2026-27 Olympiad cycle. Schools must send registrations at least 30 days before their chosen exam date.
Read full notice →Archived 8 Sept 2026
SOF has dispatched registration forms to schools for the 2026-27 session. Schools that have not received forms are advised to contact info@sofworld.org. The registration fee remains Rs. 125 per student.
Read full notice →Archived 23 Aug 2026
The previous cycle NSO Level 1 exam results were released in January 2026, with Level 2 exams held in February 2026. Results are typically declared within 8 weeks of examination.
Read full notice →Archived 10 Sept 2026
Science Olympiad Foundation officially renamed the National Science Olympiad (NSO) to International Science Olympiad (ISO) starting from the 2026-27 academic session.
Read full notice →Archived 8 Sept 2026
SOF has opened online registration for the 2026-27 academic session. Students can register through their schools for the National Science Olympiad, with schools required to submit forms at least 30 days before the chosen exam date.
Read full notice →Archived 7 Sept 2026
Science Olympiad Foundation has released the Level 1 exam schedule for ISO 2026-27. Schools can choose from three dates: October 30, November 19, or December 3, 2026. Registration must be completed 30 days before the chosen exam date.
Read full notice →Archived 6 Sept 2026
The Science Olympiad Foundation changed the name of NSO to ISO (International Science Olympiad) starting from the 2026-27 academic session, expanding its international scope while maintaining the same exam structure.
Read full notice →Archived 5 Sept 2026
The Science Olympiad Foundation released NSO Level 2 results for the 2025-26 academic session in March 2026. Students who appeared for the February 2026 exam can check their results at results.sofworld.org.
Read full notice →Archived 23 Aug 2026
The Science Olympiad Foundation has renamed the National Science Olympiad (NSO) to International Science Olympiad (ISO) starting from the 2026-27 academic session. The exam structure and eligibility remain unchanged.
Read full notice →Archived 3 Sept 2026
Science Olympiad Foundation officially announced exam dates for the 2026-27 International Science Olympiad (ISO). Schools can select one of three dates: October 30, November 19, or December 3, 2026.
Read full notice →Archived 7 Sept 2026
<cite index="17-3">Science Olympiad Foundation officially declared the NSO Level 2 Results 2026 on February 15, 2026 for the 2025-2026 academic session.</cite>
Read full notice →Archived 31 Aug 2026
SOF confirmed that Level 2 exam dates for NSO, IMO, and IEO will be announced by December 2026, tentatively scheduled for the second or third Sunday of February 2027 for Classes 3-12.
Read full notice →Archived 14 Aug 2026
The Science Olympiad Foundation released the NSO Level 2 results for the 2025-26 cycle in March 2026, with the Level 2 exam having been conducted on February 8 and 15, 2026.
Read full notice →Archived 4 Sept 2026
SOF released the NSO Level 2 results for the 2025-26 session in March 2026, concluding the previous academic year's olympiad cycle.
Read full notice →Archived 5 Sept 2026
SOF has dispatched Olympiad registration forms to schools for the 2026-27 academic year. Schools that haven't received forms can contact info@sofworld.org for assistance.
Read full notice →Archived 14 Aug 2026
The Science Olympiad Foundation released NSO Level 2 results for the 2025-26 session in March 2026 on the official results portal.
Read full notice →Archived 3 Sept 2026
Science Olympiad Foundation released the NSO Level 1 results for the 2025-26 session. Students can check their scores, ranks, and Level 2 qualification status through the official website or their respective schools.
Read full notice →Archived 2 Sept 2026
SOF issued Level 2 admit cards for qualified students. The Level 2 exam was conducted on February 8, 2026 (except Maharashtra) and February 15, 2026 for Maharashtra students.
Read full notice →Archived 2 Sept 2026
Science Olympiad Foundation released NSO Level 1 Result 2025-26 showing scores, ranks, and Level 2 qualification status for students from Classes 1 to 12.
Read full notice →Archived 1 Sept 2026
SOF announced NSO Level 2 Result 2025-26 on March 18, 2026. International and zonal toppers receive awards, medals, and scholarships based on their performance.
Read full notice →Archived 1 Sept 2026
Science Olympiad Foundation has released the NSO Level 1 exam schedule with three date options: October 30, November 19, and December 3, 2026. Schools must select one date and complete registration 30 days prior to their chosen exam date.
Read full notice →Archived 14 Aug 2026
SOF has confirmed that the NSO/ISO will have a second-level exam for students of Classes 3 to 12. Level 2 dates will be announced by December 2026, tentatively scheduled for the 2nd or 3rd Sunday of February 2027.
Read full notice →Archived 24 Jul 2026
SOF NSO Level 2 Result 2025-26 declared
28 Jun 2026Science Olympiad Foundation released NSO Level 2 results for the 2025-26 cycle on March 18, 2026. Students can check results at results.sofworld.org using their roll numbers.
Read full notice →Archived 28 Aug 2026
The Science Olympiad Foundation released the NSO Level 2 results for 2025-26 in March 2026, completing the previous academic cycle and paving way for the new 2026-27 session.
Read full notice →Archived 27 Aug 2026
SOF NSO 2025-26 Level 2 result declared
26 Jun 2026SOF released the NSO Level 2 result 2025-26 on March 18, 2026. Students who appeared for the Level 2 exam on February 8, 2026 (or February 15, 2026 in Maharashtra) can check results at results.sofworld.org.
Read full notice →Archived 26 Aug 2026
SOF has released official sample question papers for the NSO 2026-27 exam in PDF format. These papers help students familiarize themselves with the exam pattern and assess their preparation level before the Level 1 exam.
Read full notice →Archived 24 Jul 2026
Science Olympiad Foundation has released the Level 1 exam dates for SOF NSO 2026-27. Schools can choose from three dates: 30th October, 19th November, or 3rd December 2026. The entire school must conduct the exam on one chosen date only.
Read full notice →Archived 24 Jul 2026
Olympiad registration forms for the 2026-27 session have been dispatched to registered schools. Schools that have not received forms should contact SOF at info@sofworld.org. Registration must be completed at least 30 days before the chosen exam date.
Read full notice →Archived 24 Jul 2026
The Science Olympiad Foundation released NSO Level 2 results on March 19, 2026. Level 1 results for the 2025-26 session were announced on January 12, 2026, within the typical 8-week timeframe after exams.
Read full notice →Archived 14 Aug 2026
Schools can now register for participation in the upcoming NSO cycle. The Science Olympiad Foundation has invited institutional registrations with early bird benefits for schools enrolling before the first deadline.
Read full notice →Archived 5 Jul 2026
SOF has released the Level 1 results on its official portal. Students can check their ranks, scores and international rankings. Top performers from each class have qualified for the Level 2 examination scheduled in the coming months.
Read full notice →Archived 5 Jul 2026
The foundation has outlined the awards structure for NSO 2025-26, including cash prizes, medals, certificates of distinction and educational scholarships for international rank holders at Level 2. Special recognition will be given to class toppers and zonal champions.
Read full notice →Archived 5 Jul 2026
The Science Olympiad Foundation completed the first level examination for NSO 2025-26 in participating schools nationwide. Students from Classes 1-12 appeared for the school-level round which tests conceptual understanding in Physics, Chemistry, Biology and logical reasoning.
Read full notice →Archived 5 Jul 2026
Older dates (146)
ISO Level 2 results (expected)
Sun, 11 Apr, 2027Typically declared within 8 weeks of Level 2 exam
Archived 10 Sept 2026
NSO Level 2 result (expected)
Wed, 31 Mar, 2027Level 2 results typically announced in March; based on 2025-26 cycle
Archived 7 Sept 2026
NSO 2026-27 Level 2 Result (expected)
Sat, 20 Mar, 2027Level 2 results typically released in March
Archived 28 Aug 2026
ISO Level 2 Result (expected)
Sat, 20 Mar, 2027Level 2 results typically released in mid-March
Archived 6 Sept 2026
Level 2 Result (expected)
Sat, 20 Mar, 2027Typically 4-6 weeks after Level 2 exam
Archived 5 Sept 2026
NSO Level 2 result (expected)
Sat, 20 Mar, 2027Level 2 results typically in March
Archived 4 Sept 2026
ISO Level 2 result (expected)
Mon, 15 Mar, 2027Level 2 results typically announced in March
Archived 8 Sept 2026
ISO Level 2 result (expected)
Mon, 15 Mar, 2027Final results typically released in March
Archived 3 Sept 2026
NSO Level 2 Result (expected)
Mon, 15 Mar, 2027Level 2 results expected in March 2027
Archived 27 Aug 2026
NSO Level 2 result (expected)
Mon, 15 Mar, 2027Level 2 results typically released in March
Archived 31 Aug 2026
NSO 2026-27 Level 2 result (expected)
Mon, 15 Mar, 2027Results typically declared within 8 weeks of Level 2 exam
Archived 2 Sept 2026
🏅Level 2 Exam (tentative)
Thu, 25 Feb, 2027Tentatively 2nd or 3rd Sunday of February 2027; for Classes 3-12 qualifiers
Archived 24 Jul 2026
🏅NSO Level 2 Exam (tentative)
Fri, 19 Feb, 2027Tentatively scheduled for 2nd or 3rd Sunday of February 2027 for Classes 3-12 qualifiers
Archived 23 Aug 2026
🏅NSO Level 2 exam (tentative)
Tue, 16 Feb, 2027Tentatively 2nd or 3rd Sunday of February 2027; exact date to be announced by December 2026
Archived 14 Aug 2026
🏅ISO Level 2 exam (expected)
Sun, 14 Feb, 2027Tentatively on 2nd or 3rd Sunday of February 2027 for qualifying students from classes 3-12. Official dates to be announced by December 2026. · no key published for this stage
Archived 10 Sept 2026
🏅NSO Level 2 exam (expected)
Sun, 14 Feb, 2027Tentatively on 2nd or 3rd Sunday of February 2027; for qualified students Classes 3-12
Archived 7 Sept 2026
🏅ISO Level 2 exam (expected)
Sun, 14 Feb, 2027Tentatively 2nd or 3rd Sunday of February 2027; dates to be announced by December 2026
Archived 3 Sept 2026
🏅NSO 2026-27 Level 2 exam (expected)
Sun, 14 Feb, 2027SOF indicates tentatively 2nd or 3rd Sunday of February 2027; for Classes 3-12 qualifiers
Archived 26 Aug 2026
🏅NSO Level 2 Exam (expected)
Sun, 14 Feb, 2027Tentatively 2nd or 3rd Sunday of February 2027; for Classes 3-12 Level 1 qualifiers
Archived 27 Aug 2026
🏅ISO Level 2 exam (expected)
Sun, 14 Feb, 2027Tentatively 2nd or 3rd Sunday of February 2027; dates to be announced by December 2026
Archived 6 Sept 2026
🏅NSO 2026-27 Level 2 Exam (expected)
Sun, 14 Feb, 2027Level 2 exam tentatively on 2nd or 3rd Sunday of February 2027
Archived 28 Aug 2026
🏅NSO Level 2 exam (expected)
Sun, 14 Feb, 2027Tentatively on 2nd or 3rd Sunday of February 2027; for Classes 3-12 qualifiers only
Archived 31 Aug 2026
🏅ISO 2026-27 Level 2 Exam (expected)
Sun, 14 Feb, 2027Tentatively 2nd or 3rd Sunday of February 2027, to be announced by December 2026
Archived 1 Sept 2026
🏅NSO 2026-27 Level 2 exam (expected)
Sun, 14 Feb, 2027Tentatively 2nd or 3rd Sunday of February 2027; dates to be announced by Dec 2026
Archived 2 Sept 2026
🏅ISO Level 2 exam (expected)
Sun, 14 Feb, 2027Tentatively on 2nd or 3rd Sunday of February 2027; for qualified students from classes 3-12 · no key published for this stage
Archived 8 Sept 2026
🏅Level 2 Exam (expected)
Sun, 14 Feb, 2027Tentatively 2nd or 3rd Sunday of February 2027; for Classes 3-12 qualifiers only
Archived 5 Sept 2026
🏅NSO Level 2 exam (expected)
Sun, 14 Feb, 2027Tentatively 2nd or 3rd Sunday of February for Classes 3-12 qualifiers
Archived 4 Sept 2026
ISO Level 1 results (expected)
Thu, 28 Jan, 2027Results declared within 8 weeks of examination. Date based on typical pattern after Date 3 exam.
Archived 10 Sept 2026
ISO Level 2 admit card (expected)
Thu, 28 Jan, 2027For qualified students; typically released 10-12 days before Level 2 exam
Archived 3 Sept 2026
NSO Level 2 admit card (expected)
Thu, 28 Jan, 2027Level 2 admit cards typically released in late January
Archived 31 Aug 2026
NSO Level 1 result (expected)
Thu, 28 Jan, 2027Results typically released within 8 weeks of exam; based on 2025-26 pattern
Archived 7 Sept 2026
Level 1 results expected
Thu, 21 Jan, 2027Results typically declared within 8 weeks of exam
Archived 24 Jul 2026
ISO Level 1 result (expected)
Fri, 15 Jan, 2027Results typically announced in January, about 8 weeks after exams
Archived 8 Sept 2026
NSO 2026-27 Level 1 result (expected)
Fri, 15 Jan, 2027Results typically released 6-8 weeks after exam; based on previous cycle patterns
Archived 26 Aug 2026
NSO Level 1 Result (expected)
Fri, 15 Jan, 2027Results typically announced within 6-8 weeks of exam
Archived 27 Aug 2026
ISO Level 1 Result (expected)
Fri, 15 Jan, 2027Results typically declared within 8 weeks of examination
Archived 6 Sept 2026
NSO 2026-27 Level 1 Result (expected)
Fri, 15 Jan, 2027Results typically released 8 weeks after exam; expected in January 2027
Archived 28 Aug 2026
NSO Level 1 result (expected)
Fri, 15 Jan, 2027Level 1 results typically released in January, within 8 weeks of exam
Archived 31 Aug 2026
NSO 2026-27 Level 1 result (expected)
Fri, 15 Jan, 2027Results typically declared within 8 weeks of exam
Archived 2 Sept 2026
ISO Level 1 result (expected)
Fri, 15 Jan, 2027Results declared within 8 weeks of examination; includes Level 2 qualification list
Archived 3 Sept 2026
Level 1 Result (expected)
Fri, 15 Jan, 2027Results typically declared within 8 weeks of examination; qualifiers advance to Level 2
Archived 5 Sept 2026
NSO Level 1 result (expected)
Fri, 15 Jan, 2027Results typically declared 8 weeks after exam
Archived 4 Sept 2026
NSO Level 1 results announcement
Tue, 12 Jan, 2027Results typically released 8 weeks after exams
Archived 14 Aug 2026
🏅NSO Level 1 exam date (2026-27 cycle)
Mon, 11 Jan, 2027First level examination conducted in participating schools across India
Archived 5 Jul 2026
Level 2 exam dates announcement expected
Thu, 31 Dec, 2026SOF typically announces Level 2 dates by December
Archived 24 Jul 2026
NSO Level 2 exam dates announcement expected
Wed, 30 Dec, 2026SOF expected to announce Level 2 exam schedule by December 2026
Archived 23 Aug 2026
Student enrollment deadline
Tue, 22 Dec, 2026Final date for schools to submit student enrollment lists for Level 1 examination
Archived 5 Jul 2026
ISO Level 1 answer key release (expected)
Wed, 16 Dec, 2026Answer keys typically released within 2 weeks of last exam date
Archived 3 Sept 2026
Level 1 Answer Key (expected)
Tue, 15 Dec, 2026Typically released 10-15 days after last exam date
Archived 5 Sept 2026
🏅Level 1 Exam - Date Three
Thu, 3 Dec, 20263rd December 2026; separate question paper from other dates
Archived 24 Jul 2026
🏅NSO Level 1 - Set 3 exam date
Thu, 3 Dec, 2026Third and final exam date option for schools
Archived 14 Aug 2026
🏅NSO Level 1 Exam - Date Option 3
Thu, 3 Dec, 2026Third exam date option for schools; December 3, 2026
Archived 23 Aug 2026
🏅ISO Level 1 - Date 3 (formerly NSO)
Thu, 3 Dec, 2026Schools select one of three dates; no answer key published for this stage · no key published for this stage
Archived 10 Sept 2026
🏅ISO Level 1 exam - Date 3
Thu, 3 Dec, 2026Schools can choose any one of three dates; conducted in schools during school hours · no key published for this stage
Archived 8 Sept 2026
🏅ISO Level 1 - Date 3 (formerly NSO)
Thu, 3 Dec, 2026Alternative exam date for schools
Archived 3 Sept 2026
🏅NSO 2026-27 Level 1 exam (Set C - Date 3)
Thu, 3 Dec, 2026Final exam date option for schools
Archived 2 Sept 2026
🏅NSO 2026-27 Level 1 exam - Date 3
Thu, 3 Dec, 2026Third and final Level 1 exam date for 2026-27 cycle
Archived 26 Aug 2026
🏅NSO Level 1 Exam - Set C
Thu, 3 Dec, 2026Third exam date option for schools
Archived 27 Aug 2026
🏅NSO 2026-27 Level 1 Exam (Set C)
Thu, 3 Dec, 2026Third exam date option for schools
Archived 28 Aug 2026
🏅ISO Level 1 - Date Option 3
Thu, 3 Dec, 2026Schools select one date from three options to conduct the exam
Archived 6 Sept 2026
🏅NSO Level 1 exam - Set C (expected)
Thu, 3 Dec, 2026SOF ISO/NSO 2026-27 Date Three; schools select one date
Archived 7 Sept 2026
🏅NSO Level 1 exam - Set C
Thu, 3 Dec, 2026Schools choose one of three dates; separate question papers for each date
Archived 31 Aug 2026
🏅ISO 2026-27 Level 1 Exam - Date 3
Thu, 3 Dec, 2026Schools choose one of three dates for Level 1
Archived 1 Sept 2026
🏅ISO (formerly NSO) Level 1 - Date 3
Thu, 3 Dec, 2026Third exam date option for schools
Archived 5 Sept 2026
🏅NSO Level 1 - Set C exam
Thu, 3 Dec, 2026Schools choose one of three dates
Archived 4 Sept 2026
🏅Level 1 Exam - Date Two
Thu, 19 Nov, 202619th November 2026; separate question paper from Date One
Archived 24 Jul 2026
🏅NSO Level 1 - Set 2 exam date
Thu, 19 Nov, 2026Second of three exam date options for schools
Archived 14 Aug 2026
🏅NSO Level 1 Exam - Date Option 2
Thu, 19 Nov, 2026Second exam date option for schools; November 19, 2026
Archived 23 Aug 2026
🏅ISO Level 1 - Date 2 (formerly NSO)
Thu, 19 Nov, 2026Schools select one of three dates; no answer key published for this stage · no key published for this stage
Archived 10 Sept 2026
🏅ISO Level 1 - Date 2 (formerly NSO)
Thu, 19 Nov, 2026Alternative exam date for schools
Archived 3 Sept 2026
🏅NSO 2026-27 Level 1 exam (Set B - Date 2)
Thu, 19 Nov, 2026Alternative exam date option for schools
Archived 2 Sept 2026
🏅ISO 2026-27 Level 1 Exam - Date 2
Thu, 19 Nov, 2026Schools choose one of three dates for Level 1
Archived 1 Sept 2026
🏅NSO Level 1 exam - Set B
Thu, 19 Nov, 2026Schools choose one of three dates; separate question papers for each date
Archived 31 Aug 2026
🏅NSO 2026-27 Level 1 exam - Date 2
Thu, 19 Nov, 2026Second of three Level 1 exam dates
Archived 26 Aug 2026
🏅ISO (formerly NSO) Level 1 - Date 2
Thu, 19 Nov, 2026Second exam date option for schools
Archived 5 Sept 2026
🏅NSO Level 1 Exam - Set B
Thu, 19 Nov, 2026Alternative exam date for schools; different question paper than Set A
Archived 27 Aug 2026
🏅NSO 2026-27 Level 1 Exam (Set B)
Thu, 19 Nov, 2026Second exam date option for schools
Archived 28 Aug 2026
🏅ISO Level 1 - Date Option 2
Thu, 19 Nov, 2026Schools select one date from three options to conduct the exam
Archived 6 Sept 2026
🏅NSO Level 1 exam - Set B (expected)
Thu, 19 Nov, 2026SOF ISO/NSO 2026-27 Date Two; schools select one date
Archived 7 Sept 2026
🏅ISO Level 1 exam - Date 2
Thu, 19 Nov, 2026Schools can choose any one of three dates; conducted in schools during school hours · no key published for this stage
Archived 8 Sept 2026
🏅NSO Level 1 - Set B exam
Thu, 19 Nov, 2026Schools choose one of three dates
Archived 4 Sept 2026
Registration deadline for Set 3 (Dec 3 exam date)
Tue, 3 Nov, 202630 days before third exam date option
Archived 14 Aug 2026
Registration deadline for NSO Date 3 schools (30 days before Dec 3)
Tue, 3 Nov, 2026Schools choosing December 3 exam date must submit registrations by this date
Archived 23 Aug 2026
NSO 2026-27 Registration Deadline (Set C - Dec 3)
Tue, 3 Nov, 2026Schools must register 30 days before chosen exam date
Archived 28 Aug 2026
Registration deadline for Set C (expected)
Tue, 3 Nov, 2026Schools should send registrations 30 days before chosen exam date
Archived 31 Aug 2026
Registration deadline for NSO 2026-27 Set C
Tue, 3 Nov, 202630 days before Set C exam date
Archived 2 Sept 2026
Registration deadline for Date 3 exam (Dec 3)
Tue, 3 Nov, 2026Schools must send registrations 30 days before chosen exam date
Archived 8 Sept 2026
Last date to register for Date 3
Tue, 3 Nov, 202630 days before third exam date
Archived 5 Sept 2026
Registration deadline for Set C (expected)
Tue, 3 Nov, 2026Schools must register at least 30 days before exam date
Archived 4 Sept 2026
🏅Level 1 Exam - Date One
Fri, 30 Oct, 202630th October 2026; schools choose one date from three options
Archived 24 Jul 2026
🏅NSO Level 1 - Set 1 exam date
Fri, 30 Oct, 2026First of three exam date options for schools
Archived 14 Aug 2026
🏅NSO Level 1 Exam - Date Option 1
Fri, 30 Oct, 2026First exam date option for schools; October 30, 2026
Archived 23 Aug 2026
🏅ISO Level 1 - Date 1 (formerly NSO)
Fri, 30 Oct, 2026Schools select one of three dates. NSO renamed to ISO for 2026-27; no answer key published for this stage · no key published for this stage
Archived 10 Sept 2026
🏅ISO Level 1 exam - Date 1
Fri, 30 Oct, 2026Schools can choose any one of three dates; conducted in schools during school hours · no key published for this stage
Archived 8 Sept 2026
🏅ISO Level 1 - Date 1 (formerly NSO)
Fri, 30 Oct, 2026Schools may select one of three dates; NSO renamed to ISO from 2026-27
Archived 3 Sept 2026
🏅NSO 2026-27 Level 1 exam (Set A - Date 1)
Fri, 30 Oct, 2026Schools select one of three available dates
Archived 2 Sept 2026
🏅NSO 2026-27 Level 1 exam - Date 1
Fri, 30 Oct, 2026First of three Level 1 exam dates; schools choose one date
Archived 26 Aug 2026
🏅NSO Level 1 Exam - Set A
Fri, 30 Oct, 2026Schools may choose one of three dates; conducted at school premises
Archived 27 Aug 2026
🏅NSO 2026-27 Level 1 Exam (Set A)
Fri, 30 Oct, 2026First exam date option for schools
Archived 28 Aug 2026
🏅ISO Level 1 - Date Option 1
Fri, 30 Oct, 2026Schools select one date from three options to conduct the exam
Archived 6 Sept 2026
🏅NSO Level 1 exam - Set A (expected)
Fri, 30 Oct, 2026SOF ISO/NSO 2026-27 Date One; schools select one date
Archived 7 Sept 2026
🏅NSO Level 1 exam - Set A
Fri, 30 Oct, 2026Schools choose one of three dates; separate question papers for each date
Archived 31 Aug 2026
🏅ISO 2026-27 Level 1 Exam - Date 1
Fri, 30 Oct, 2026Schools choose one of three dates for Level 1
Archived 1 Sept 2026
🏅ISO (formerly NSO) Level 1 - Date 1
Fri, 30 Oct, 2026Schools select one of three dates; renamed to International Science Olympiad (ISO) from 2026-27
Archived 5 Sept 2026
🏅NSO Level 1 - Set A exam
Fri, 30 Oct, 2026Schools choose one of three dates
Archived 4 Sept 2026
Registration deadline for Set 2 (Nov 19 exam date)
Tue, 20 Oct, 202630 days before second exam date option
Archived 14 Aug 2026
Registration deadline for NSO Date 2 schools (30 days before Nov 19)
Tue, 20 Oct, 2026Schools choosing November 19 exam date must submit registrations by this date
Archived 23 Aug 2026
NSO 2026-27 Registration Deadline (Set B - Nov 19)
Tue, 20 Oct, 2026Schools must register 30 days before chosen exam date
Archived 28 Aug 2026
Registration deadline for Set B (expected)
Tue, 20 Oct, 2026Schools should send registrations 30 days before chosen exam date
Archived 31 Aug 2026
Registration deadline for NSO 2026-27 Set B
Tue, 20 Oct, 202630 days before Set B exam date
Archived 2 Sept 2026
Registration deadline for Date 2 exam (Nov 19)
Tue, 20 Oct, 2026Schools must send registrations 30 days before chosen exam date
Archived 8 Sept 2026
Last date to register for Date 2
Tue, 20 Oct, 202630 days before second exam date
Archived 5 Sept 2026
Registration deadline for Set B (expected)
Tue, 20 Oct, 2026Schools must register at least 30 days before exam date
Archived 4 Sept 2026
School registration deadline for Date 1 (30 days before exam)
Wed, 30 Sept, 2026Schools must submit registration forms at least 30 days before chosen exam date
Archived 24 Jul 2026
Registration deadline for Set 1 (Oct 30 exam date)
Wed, 30 Sept, 2026Schools must register at least 30 days before chosen exam date
Archived 14 Aug 2026
Registration deadline for NSO Date 1 schools (30 days before Oct 30)
Wed, 30 Sept, 2026Schools choosing October 30 exam date must submit registrations by this date
Archived 23 Aug 2026
Registration deadline for ISO Date 1 (expected)
Wed, 30 Sept, 2026Schools must register at least 30 days before chosen exam date
Archived 3 Sept 2026
Registration deadline for NSO 2026-27 Set A
Wed, 30 Sept, 2026Schools must send registrations 30 days before chosen exam date
Archived 2 Sept 2026
NSO 2026-27 school registration deadline (Date 1)
Wed, 30 Sept, 2026Schools should register 30 days before chosen exam date; deadline for Oct 30 exam
Archived 26 Aug 2026
Last date to register for Date 1 (30 days before exam)
Wed, 30 Sept, 2026Schools must send registrations by 30 days before chosen exam date
Archived 5 Sept 2026
Registration deadline for Date 1 exam (Oct 30)
Wed, 30 Sept, 2026Schools must send registrations 30 days before chosen exam date
Archived 8 Sept 2026
Registration closes for Set A (expected)
Wed, 30 Sept, 2026Registration must be submitted 30 days before chosen exam date
Archived 27 Aug 2026
NSO 2026-27 Registration Deadline (Set A - Oct 30)
Wed, 30 Sept, 2026Schools must register 30 days before chosen exam date
Archived 28 Aug 2026
Registration deadline for Set A (expected)
Wed, 30 Sept, 2026Schools should send registrations 30 days before chosen exam date
Archived 31 Aug 2026
ISO 2026-27 Registration Deadline (Set 1)
Wed, 30 Sept, 2026Registration must be completed 30 days before chosen exam date
Archived 1 Sept 2026
Registration deadline for Set A (expected)
Wed, 30 Sept, 2026Schools must register at least 30 days before exam date
Archived 4 Sept 2026
Student registration opens for NSO 2026-27
Mon, 24 Aug, 2026Registered schools can begin enrolling students for the new academic year cycle
Archived 5 Jul 2026
Final school registration deadline
Tue, 11 Aug, 2026Last date for schools to complete registration for participation in NSO 2026-27
Archived 5 Jul 2026
Registration window opens (expected)
Sat, 1 Aug, 2026Schools typically start receiving registration forms and begin enrolling students from August for October exams
Archived 27 Aug 2026
NSO Level 2 results declaration
Mon, 6 Jul, 2026Final results with international ranks, awards list and scholarship details
Archived 5 Jul 2026
Registration opens for schools (2026-27)
Wed, 1 Jul, 2026Schools typically begin registration in July for the academic year. Must register 30 days before chosen exam date.
Archived 6 Sept 2026
School registration deadline (early bird)
Thu, 25 Jun, 2026Last date for schools to register with discounted fees for the 2026-27 NSO cycle
Archived 5 Jul 2026
🏅NSO Level 2 examination date
Mon, 8 Jun, 2026Second level exam for qualified students from Level 1; conducted at designated centres
Archived 5 Jul 2026
Registration opens for schools (2026-27 cycle)
Mon, 1 Jun, 2026Schools can register anytime but must complete registration at least 30 days before their chosen exam date. Registration forms dispatched to schools.
Archived 10 Sept 2026
Registration opens for schools (expected)
Mon, 1 Jun, 2026Schools typically begin registrations 4-5 months before first exam date
Archived 5 Sept 2026
NSO 2025-26 Level 2 result declared
Wed, 18 Mar, 2026Results available at results.sofworld.org
Archived 27 Aug 2026
NSO 2025-26 Level 2 Result
Wed, 18 Mar, 2026Level 2 results declared for 2025-26 cycle
Archived 31 Aug 2026
NSO 2025-26 Level 2 Result (past cycle)
Sun, 15 Mar, 2026Previous cycle Level 2 result released
Archived 6 Sept 2026
🏅NSO 2025-26 Level 2 exam (India except Maharashtra)
Sun, 8 Feb, 2026For Classes 3-12 qualifiers from Level 1
Archived 27 Aug 2026
🏅NSO 2025-26 Level 2 Exam
Sun, 8 Feb, 2026Level 2 exam for all regions except Maharashtra; Maharashtra appeared on Feb 15
Archived 31 Aug 2026
🏅NSO 2025-26 Level 2 Exam (Rest of India)
Sun, 8 Feb, 2026Level 2 for Classes 3-12, all regions except Maharashtra
Archived 1 Sept 2026
NSO 2025-26 Level 1 result announced
Mon, 12 Jan, 2026Results released at results.sofworld.org
Archived 27 Aug 2026
NSO 2025-26 Level 1 Result
Mon, 12 Jan, 2026Level 1 results released for 2025-26 cycle
Archived 31 Aug 2026
NSO 2025-26 Level 1 Result
Mon, 12 Jan, 2026Level 1 results declared online
Archived 1 Sept 2026
🏅NSO 2025-26 Level 1 exam (Set A)
Thu, 13 Nov, 2025Completed - first of three Level 1 exam dates for 2025-26 cycle
Archived 31 Aug 2026
🏅NSO 2025-26 Level 1 Exam - Set A
Thu, 13 Nov, 2025Level 1 conducted for Classes 1-12
Archived 1 Sept 2026
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