Date Display Format

By default Postbox displays the time only (without the date) for messages with today's date. For messages older than this, Postbox will display the day (Monday, Tuesday) if it falls within the week, and then the date for messages beyond a week.

Changing the Date Format

To change the information displayed, modify these preferences using the Config Editor.

The first setting is:


By toggling this to "true", you'll remove the relative dates such as "today" or "yesterday", and it will be replaced with simply time for messages from today, then date and time for all other messages.

The next set of preferences provide more fine-grained control.  If a preference below is missing, you can add the preference by right-clicking anywhere in the preferences list and selecting New > Integer.

PreferenceApplies toDefault value Messages with today's date 0
mail.ui.display.dateformat.thisweek Messages with a date in the past seven days 4
mail.ui.display.dateformat.default Older messages 2

These preferences can have the following values:

ValueMeaningExample date and time
0 No date 10:23 AM
1 Your system's long* date format Friday, December 31 2003 10:23 AM
2 Your system's short* date format 12/31/1999 10:23 AM
3 Year and month, separated by a slash 1999/12 10:23 AM
4 Abbreviated day name Friday

* Some operating systems have only one date format. On these systems, the values 1 and 2 produce the same result.


This article includes content contributed by the MozillaZine Knowledge Base. Thank you to all of the contributors who created this content and for MozillaZine for sharing this information.