Contests

Ongoing contests

Contest	Users
April Fools' Day Contest 3seasonal Ends in 11:59:37 Apr 1, 2026, 0:00 - Apr 8, 2026, 0:00 7 days window	190
Bruce's CIW Training Contest 2external Ends in 3 days 06:29:37 Apr 4, 2026, 13:00 - Apr 10, 2026, 18:30 04:00 window	4
Bruce's CCO Training Contest 2external Ends in 5 days 06:59:37 Apr 4, 2026, 13:00 - Apr 12, 2026, 19:00 04:00 window	4

Upcoming contests

There are no scheduled contests at this time.

Past contests

Contest	Users
GCC '26 #1 Apr 1, 2026, 0:00 - Apr 6, 2026, 0:00 04:00 window	25
Bruce's CCO Training Contest 1external Mar 28, 2026, 0:00 - Apr 5, 2026, 19:00 04:00 window	37
Bruce's CIW Training Contest 1external Mar 28, 2026, 0:00 - Apr 3, 2026, 18:30 04:00 window	26
2026 Canadian Informatics Workshop - Day 1 Mirrormirror Mar 10, 2026, 16:07 - Mar 31, 2026, 23:59 02:00 window	34
2026 Canadian Informatics Workshop - Day 2 Mirrormirror Mar 10, 2026, 16:07 - Mar 31, 2026, 23:59 02:00 window	22
2026 Canadian Computing Competition Junior Division Mirrormirror Feb 25, 2026, 20:52 - Mar 31, 2026, 23:59 03:00 window	157
2026 Canadian Computing Competition Senior Division Mirrormirror Feb 25, 2026, 20:52 - Mar 31, 2026, 23:59 03:00 window	158
An Advanced Algorithmic Assessment 1 rated Dec 18, 2025, 0:00 - Dec 25, 2025, 0:00 03:00 window	310
Waterloo 2025 Fall Local Unofficial Mirror Oct 6, 2025, 12:00 - Oct 19, 2025, 23:59 03:00 window	47
2025 International Olympiad in Informatics Day 2 (Mirror)mirror Aug 9, 2025, 12:00 - Aug 31, 2025, 0:00 05:00 window	39
2025 International Olympiad in Informatics Day 1 (Mirror)mirror Aug 2, 2025, 13:00 - Aug 26, 2025, 0:00 05:00 window	111
2025 Canadian Computing Olympiad - Day 1 Mirrormirror May 31, 2025, 14:30 - Jun 14, 2025, 0:00 04:00 window	77
2025 Canadian Computing Olympiad - Day 2 Mirrormirror May 31, 2025, 14:30 - Jun 14, 2025, 0:00 04:00 window	16
2025 Canadian Informatics Workshop - Day 1 Mirrormirror May 31, 2025, 14:30 - Jun 14, 2025, 0:00 04:00 window	29
2025 Canadian Informatics Workshop - Day 2 Mirrormirror May 31, 2025, 14:30 - Jun 14, 2025, 0:00 04:00 window	11
OTHS Coding Competition 4 May 22, 2025, 15:00 - May 30, 2025, 0:00 01:30 window	92
Bruce's CCO Training Contest 7external May 22, 2025, 0:00 - May 25, 2025, 19:00 04:00 window	32
Bruce's CCO Training Contest 6external May 15, 2025, 0:00 - May 18, 2025, 19:00 04:00 window	42
Bruce's CCO Training Contest 5external May 8, 2025, 0:00 - May 11, 2025, 19:00 04:00 window	42
Bruce's CCO Training Contest 4external May 1, 2025, 0:00 - May 4, 2025, 19:00 04:00 window	38