The 2025 AtCoder Heuristic Contest (AHC) aims to host 12 short contests and 6 long contests throughout the year. The tentative schedule is as follows: **Please note that the dates are subject to change, and the schedule will be finalized when the contest pages are published.** - 1/19 - 2/2 - 2/14–24 - 3/16 - 3/28–4/7 - 4/26 or 4/27 - 5/18 - 5/30–6/9 - 6/21 - 7/6 - 8/1-8/11