June 2025 is about to be the first month without a rated Div. 1 round
When I saw this comment, I wonder how often this has happened. After searching through the list of contests manually, I conclude that this has not happened since the inception of Codeforces.
The closest moment before is probably September 2022, where the only rated Div. 1 round is CF Global Round 22 on September 30th, 2022 (where I was a tester).
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