Turn off abbreviated time and date format

Supported on: At least Windows 11 Version 22H2

Registry

HKCU Software\Policies\Microsoft\Windows\Explorer

Value name: TurnOffAbbreviatedDateTimeFormat

Enabled: TurnOffAbbreviatedDateTimeFormat = 1

Disabled: TurnOffAbbreviatedDateTimeFormat = 0

Description

This policy setting allows you to show the longer time and date format in the system tray. If this setting is enabled, the time format will include the AM/PM time marker and the date will include the year. A reboot is required for this policy setting to take effect.