根据 CF 的话：

We would like to inform you that Codeforces will be unavailable tonight due to scheduled maintenance. The maintenance will begin at 11:30 PM (UTC) on April 10th, 2023 and is expected to last for approximately 5 hours.

开始时间 23:30 (UTC)，维护 5 个小时，那按理来讲到 12:30 (UTC+8) 就可以了。

但现在都多了一坤时了。怎么会是啊？什么时候好？