To affix or note a date by stamping.

Information which may be stored in a file's directory entry to show the dates on which the file was created, last modified, and last accessed for reading. Only the modification date is available in the FAT file system. See also Time Stamp.

stamp with a date; "The package is dated November 24"

a spot that indicates when a specific article of the blog was written

Shows the system date of which your computer keeps track.