datemark

English

Etymology

date +‎ mark

Noun

datemark (plural datemarks)

1. A marking that indicates a date.
   • 1916, Proceedings of the Royal Society of Canada, page 479:

     Again, some light on those great datemarks, the migrations to America, ought to be derivable from studies of the indispensable conditions for crossing the Pacific, and particularly the stages of development of navigation.

   • 2010, James Howard-Johnston, Witnesses to a World Crisis, page 49:

     It ends with a datemark (8 April 628), a note that the army was striking camp and setting off on the march home, and a request for prayers for their safe return (734. 13–17).