High Quality Content by WIKIPEDIA articles! In computing, time and date are commands that are used to display and set the current time and date of the operating system. Both commands are available in DOS, OS/2 and Microsoft Windows command line interpreters (shells) such as COMMAND.COM, cmd.exe and 4DOS/4NT. The Unix command date displays both the time and date, but does not allow the normal users to change either. Users with superuser privileges may use date -s <new-date-time> to change the time and date. The Unix command time performs a different function. In Windows PowerShell, date is a short form for the Get-Date Cmdlet which returns the current system time object. The Set verb of the Cmdlet is used to set both date and time.System time is measured by a system clock, which is typically implemented as a simple count of the number of ticks that have transpired since some arbitrary starting date, called the epoch.

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