Try to use the event_tz before falling back on the mail_tz (user tz) in the context. Add a tool method allowing to override this behavior easily instead of concatenating "or". As template is modified anyway translations are already broken. Task-2699765 closes odoo/odoo#86513 X-original-commit: odoo/odoo@6ef642ccdc Part-of: odoo/odoo#86070 Related: odoo/enterprise#25322 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>