It has been since the 911 hate stimulated terror tragedy.
have passed since the International Space Station was first launched.
The Constitution of the United States was adopted ago.

Auto Maintaining Time Since Routine

This script is an auto maintaining "time since something happened" timer. That time could be a birth date, time in business, or any similar use. Just add the script where you want an amount of time passed from a starting date, then supply the date (and other options if you wish) within the passing script. You never have to update that time passed. The display can be in years, months or days, and can be rounded up or down or displayed as a decimal (number of places optional).