Gmail Show Time

Google Chrome extension

Gmail Show Time extension - Shows full date/time in email listing and detail headers. Supports custom date/time format.

Why?
Gmails default date/time display format depends on the age of an email. This can be pretty useless if you always want all information available on screen.

Where? On the Google extension webstore.

Groups Show Time

Same as Gmail Show Time, except for Google Groups. Install via webstore.