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| Name | Start time |
|---|---|
| (China) National Olympiad in Informatics 2001 Day 1 | 2025-08-16 15:02:27 |
| (China) National Olympiad in Informatics 2006 Day 1 (NOI 2006 Day 1) | 2025-08-15 18:06:58 |
| International Olympiad in Informatics 2025 Day 1 (IOI 2025 Day 1) | 2025-08-01 14:08:23 |
| (China) National Olympiad in Informatics 2025 Day 1 | 2025-07-20 10:11:40 |
| (China) National Olympiad in Informatics 2024 Day 1 | 2025-07-17 23:26:37 |
| Asia-Pacific Informatics Olympiad 2024 (APIO 2024) | 2025-04-02 14:59:59 |