Mike Fährmann e7b30866d0
[postprocessor:mtime] fix timestamps from datetime objects (#2307)
'datetime.timestamp()', which got used to convert datetime objects to
POSIX timestamps, assumes naive datetimes represent LOCAL time, while
datetimes in 'date' metadata fields represent UTC time.

Ref: https://docs.python.org/3/library/datetime.html#datetime.datetime.timestamp
> Naive datetime instances are assumed to represent local time
> you can obtain the POSIX timestamp by … calculating the timestamp directly
2022-03-23 23:05:14 +01:00
..
2015-10-03 14:51:13 +02:00
2021-10-13 04:07:41 +02:00
2022-03-01 03:09:57 +01:00