Microsoft Outlook depends on the “long” date format set for all Windows programs.

1. Open the control panel Regional and Language Settings applet (Region and Language in Windows 7).
2. Choose the option to customize the settings. In Windows 7, click the Additional Settings button.
3. Select the Date tab and change the long date format so that it includes the name of the day.

If your regional settings don’t offer a long date format that includes the day of the week you can type a new format into the field. Use a format similar to dddd, MMMM dd, yyyy. The set of four d’s represents the full week day name; use ddd for the abbreviated form.

Keep in mind that any change you make here will affect all Windows applications.

Tip: You can use any format you want as long as it contains valid notations and separators.

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Last reviewed on Aug 19, 2011