As of Version 9.0, unit functionality is built into the Wolfram Language »
Details and Options
- 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.