As of Version 9.0, unit functionality is built into the Wolfram Language

is a unit of time.


  • To use Day, you first need to load the Units Package using Needs["Units`"].
  • Day is equivalent to 86400 Second (SI units).
  • Day is equivalent to 24 Hour.
  • Convert[n Day,newunits] converts n Day to a form involving units newunits.
  • Day is typically abbreviated as d.