[Evolution] Evo 3.46: work week calendar display wrong?

[Paul Smith <paul mad-scientist net>]

I'm using flatpak Evolution 3.46.1 on Ubuntu 20.04 and I'm seeing
something extremely odd in the calendar, on the "Work Week" display.

Today is Wednesday Nov 16th at 1:45pm.  If I use "Day" view and select
today (via the "Select Today" button) then it shows correctly: I get
the correct day, the red line shows the current time, and at midnight
it shows tomorrow's date (17th) on the sidebar.

Now if I select "Work Week" view it shows the right week, but the red
line shows the right time BUT instead of on Wednesday, it shows on
THURSDAY (tomorrow).

Also, the background of Thursday is highlighted yellow when I assume
that it should be highlighting Wednesday (today).

And finally, the midnight date is not tomorrow (17th) but rather
Tuesday (15th)... maybe because the first day shown in my work week is
Monday (14th)?  Seems like an odd choice.

If I choose "Week" view, then I see that Wednesday is highlighted in
yellow, as I'd expect, not Thursday (I've lost the timeline in this
view though so the other aspects are not relevant).

This is not just today, I noticed it last week too but forgot to send
any email.

Is this just me?  Or are others seeing the wrong day shown in the
calendar "Work Week" view?

Just to preclude obvious things: the date and timezone on my computer
IS correct :).  As above, if I click "Select Today" it does go to the
right day.  Also all my meeting reminders, etc. are correct.  It's only
the display of the specific "Work Week" view that seems wrong.