Merge branch 'github-main', remote branch 'origin' into jean-datetime-DateTime
Try to get TIMEZONE from environment; failing that, use local time

I'm using DateTime().timezone() to get local timezone.
That's convenient, but I want to get rid of DateTime.
So need a better way to get timezone.
Return date in local timezone
Just some formatting
Add note on timezone conversion of getLastModified
Merge branch 'github-main' of github.com:plomino/Plomino into jean-datetime-DateTime
Whitespace ...
Revert small regression

See https://github.com/plomino/Plomino/commit/b28cdb4f1e6933459787ba6ec8187a8acfbf864a#commitcomment-4362218
Whitespace
Use TIMEZONE and database date format consistently
Merge pull request #447 from plomino/jean-datetime-DateTime

Use TIMEZONE and database date format consistently