Graph: 31 december measurement is first of year instead of last
In the graph view, 31 December was the firstpoint in the graph instead of last, because it's (incorrectly) marking as Week number 1 (likely a ISO 8601 week number issue).

Steps to reproduce the behavior:
- Daily weight measurements spanning end of year, including 31st December
- Look at "month view" weight graph
- Notice 31 december is FIRST point (left-most, "Week 1" side) instead of right
Shown using F-Droid version, not reproduced yet.
Expected behavior 31st December is last date = further right in the graph.
Additional context Seems very related to the "Week Number" of 31st December being marked as Week 1 of the year, which sounds like a small misunderstanding while using ISO 8601 Week number. See Tom Scott's video for some related context.
Thanks, you are absolutely right, so far I have not found an easy solution, except to replace the Java Calendar implementation with the joda time library.
I see. I am perfectly happy wontfix-ing this issue, it's a tiny corner case that doesn't bother people much. It just made me smile to notice this curiosity, so I thought to report it. Hope it made you smile too.
true its a tiny problem but this question will be reported every year, so would be great if somebody could fix it.