I am not sure, but I suspect that early this week, possibly even by Sunday, something changed at StackExchange.
I used to sometimes check my daily rep and if it is close to 200, to answer a few more questions close to 1pm. However, I got caught out again as today, I noticed that when I hover over my username on stackoverflow.com at around 12:30pm, it was already showing
today week month reputation 0 x x revisions 0 0 0 favorites 0 x x
What happened? Is the SE2 clock no longer synchronized to some universal source?