https://bugs.kde.org/show_bug.cgi?id=357470
Bug ID: 357470
Summary: Pop-up calendar displays wrong week number for
December 2020
Product: plasmashell
Version: 5.5.1
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: Calendar
Assignee: mklape...@kde.org
Reporter: k...@huftis.org
CC: plasma-b...@kde.org
The calendar that pops up when one clicks the clock widget shows the week
number of the last week in December 2020 as week 1. This is wrong. It should be
week 53 (just like for December 2015, which *is* correctly displayed).
Currently both the *last week* of 2020 and the *first week* of 2021 is shown as
week 1.
Reproducible: Always
Steps to Reproduce:
1. Click the clock icon to show the calendar.
2. Click the current month name to zoom out and then the year number to zoom
out further.
3. Click 2020 and the December.
Actual Results:
The last week of December 2020 is shown as having week number 1.
Expected Results:
The last week of December 2020 should be shown as having week number 53.
This problem may occur for other dates too; I have not done any extensive
tests.
Note that having 1 as the week number for the week with the last day(s) of a
year is not *necessarily* wrong. For example, the week number for this ‘last
week’ is 1 for 2019, 53 for 2020 and 52 for 2021. (KDE displays the correct
week number for 2019 and 2021.)
Information on calculation of the correct week numbers can be found at
https://en.wikipedia.org/wiki/ISO_week_date
The correct calendar for 2020 can be seen at
http://www.timeanddate.com/calendar/?year=2020
Or one may just use the command-line ‘cal’ utility included by default in most
Linux distros. Here’s the command for showing December 2020 and January 2021:
cal -n2 -w 12 2020
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