Date and Time Options 
The vBulletin Options > vBulletin Options > Date and Time Options setting group is used to define the way dates and times are displayed on certain sections of the board in what way and how they should behave.
Note:
Date and Time formats follow PHP formatting rules. You can find out more about these rules by visiting the PHP manual.
For information on date and time formats in PHP please visit the following page: http://www.php.net/manual-lookup.php?function=date
When you are done, click the [Save] button to apply the changes.
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