Lifestyle logging: where/when to report oversleeping

I'm a bit confused: if today is 18th, in the evening I report about the things I did or did not do during the day. Then I go to sleep, and wake up some time at the 19th in the morning. Now on which day in the lifestyle logging in the Garmin Connect app should I report about how was my sleep (overslept or not) on the night between the 18th and 19th?

I'll just add, that it's kind of stupid that I have to report oversleeping, when the watch is supposed to know when I went to sleep and when did I wake up...