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

is a unit of time.


  • To use Year, you first need to load the Units Package using Needs["Units`"].
  • Year is equivalent to 31536000 Second (SI units).
  • Year is equivalent to 365 Day.
  • Convert[n Year,newunits] converts n Year to a form involving units newunits.
  • Year is typically abbreviated as yr.