I recently upgraded to hamster 3.0.0, and now noticed hamster export tsv started to return slightly too much data. It seems there is an off-by-one-day error in the "to" date. For example:

matthijs@grubby:~$ hamster export tsv 2020-01-21 2020-01-22
activity        start time      end time        duration minutes        category        description     tags
Reizen  2020-01-21 08:55        2020-01-21 10:00        65.0    MKIT            Work
Reizen  2020-01-22 07:55        2020-01-22 08:26        31.0    MKIT            Work
Reizen  2020-01-23 18:09        2020-01-23 19:09        60.0    Day-to-Day

(I trimmed some extra activities for privacy and clarity)

This should, AFAIU (and it always did) return activities on the 21st and
22nd, but it also includes the 23rd. I originally noticed this with
february 29th and suspect an issue with leap years, but it seems to
happen with any date I've tried so far.

I have not investigated yet, first wanted to at least document this.
Maybe someone else can try to reproduce this?