This hack has been in queue for two weeks. https://mirror.codeforces.com/contest/1335/hacks

(also on that page) The time is not localized.

Actually this is not a bug, just a missing feature.

On the "Complete problemset" page, the Codeforces logo is not updated.

Example: https://mirror.codeforces.com/contest/1343/problems -- image:

The logo should be this one.

I thought this is because of caching, but the response header is cache-control: private,no-cache,no-store,max-age=0,must-revalidate.

For comparison, the brand logo is displayed correctly on the "complete problemset" page of the contests such as Kotlin heroes.