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ACSL is now accepting registrations for the 2025 - 2026 contest year.
There are four contests during the regular season. The window during which each contest can be accessed on HackerRank is as follows.
Contest #1: available Oct. 20, 2025; closes Sunday January 11, 2026 @ 11:59pm EST
Contest #2: available Jan. 5, 2026; closes Sunday March 1, 2026 @ 11:59pm EST
Contest #3: available Feb. 2, 2026; closes Sunday April 12, 2026 @ 11:59pm EDT
Contest #4: available March 2, 2026; closes Sunday May 17, 2026 @ 11:59pm EDT
Based on the scores during the regular season, top students in all divisions will be invited to participate in an online Finals competition:
Invitations E-mailed: May 1, 2026 through May 21, 2026
Invitational Finals: Saturday, May 23, 2026 (Memorial Day weekend in the United States)
There is a nominal per-student registration fee to participate in the Finals.
More details are available on the Finals page.
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