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