Wikipedia:Tip of the day/February 15
Wikipedia contains age 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 including biography articles contain infoboxes which use these age and date templates.
Results display the date of his death and his age on that date:
April 17, 1790 (aged 84)