There is the email_template_dateutil module in OCA/server-tools:

https://github.com/OCA/server-tools/tree/7.0/email_template_dateutil

This module adds the format_date filter in the email template environment, and can be used like this:

${object.date_invoice|format_date("%m/%d/%Y")}

${object.some_datetime|format_date()}

This will use the current user's timezone by default, or the server timezone, or you can pass in your own timezone.

Hello!

What's the solution for this problem on Odoo 8?

Thank you

This one seems to do the job : https://github.com/odoo/odoo/issues/1108