Wikipedia containsage calculation templates that self-update every day to keep date and age information current. These are very useful for a dynamic online encyclopedia and save users from having to regularly update that kind of information.

Many articles includingbiography articles contain infoboxes which use these age and date templates.

For example: The article forBenjamin Franklin infobox contains template
{{death date and age|1790|4|17|1706|1|17}}

Results display the date of his death and his age on that date:
April 17, 1790(1790-04-17) (aged 84)

To add this auto-updating template to your user page, use{{totd b}}