Comment 1 for bug 1405005

Thank you for your bug report. Is that still an issue?

https://gitlab.gnome.org/GNOME/gnome-calendar/issues/408 which is a similar issue has that comment

'gnome-calendar checks _NL_TIME_WEEK_1STDAY for the current locale, which is set to 19971130 (Sunday) for China. So I think you need to report this to glibc if you want it changed.'

Which hints that could be an issue with the locale defintion