When we use LDAP to authenticate, when we connect to Tuleap the first time, we are redirected to the page 'plugins/ldap/welcome'.
On this page, the local timezone is well pre-selected ('Europe/Paris' in my case). But, after saving the preferences (button 'Mettre à jour mon compte' in french), I can see the timezone 'GMT' in my Preferences. The choice seems to not be saved.
I tried to logout/relogin.
I tried to manually select the value in the welcome page.
The user needs to set the timezone (again) in its account preferences.
Working using a wrong timezone has bad effects (especially when using dates without times, the wrong day may be used).