Calendar shows wrong day (Sun. Oct. 2nd instead of Mon Oct. 2nd)

[Jean-Baptiste Lallement]

The calendar shows the wrong day of the week but the clock and the date of the system are correct.
In the picture attached it show Sunday for 2017.10.02 but it is actually Monday.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-shell 3.26.0-0ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-11.12-generic 4.13.1
Uname: Linux 4.13.0-11-generic x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 2 17:57:45 2017
DisplayManager: gdm3
InstallationDate: Installed on 2013-09-03 (1489 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130902)
ProcEnviron:
 TERM=screen-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

[Jeremy Bícha (jbicha)]

This bug is triggered because you physically changed timezones. I had someone else mention this issue in Debian GNOME a few months ago who also flew from the US to France. I don't know if a bug report has been filed upstream for this yet.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jean-Baptiste Lallement (jibel)]

Note that timezone is set to change automatically.

[Iain Lane (laney)]

pinged upstream for a review of the patch on that bug

[Iain Lane (laney)]

adding notfixing: valid bug, but we should get this via upstream as normal - via a future release

[Daniel van Vugt (vanvugt)]

Sounds more significant than Low

[Jeremy Bícha (jbicha)]

This is supposed to be fixed in gnome-shell 3.26.1.