哪位大佬知道是什么情况吗

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Our main host has scheduled service-impacting maintenance tomorrow from 0500 to 0900 UTC, which means all services will be either down or in read-only mode. Due to the nature of the maintenance, we will start bringing things down after 0400 UTC, a bit more than 8 hours from now.

https://baike.baidu.com/item/协调世界时/787659?fromtitle=UTC&fromid=5899996&fr=aladdin

UTC 就是以GMT 格林尼治 0时区为准。

就是我们东8区 UTC +8 ， 减去8个小时就是UTC时间。

0500 UTC 就是  05:00 (UTC5点钟)，+8之后就是我们 13点( 中午1点)。

按他的公告是这样的。