Is it really buggy? Is it a feature that you need a timer of 724 years ... in a web browser?
I can absolutely think of a reasons why someone would use this. For example, a DM in a role playing game might pull up a very long timer as a prop to show their players.
I agree that "the number of times you want a 724 year timer to count to zero" is negligibly small, but that is a minor subset of "the number of times you want to show a 724 year timer counting towards zero"
You may ask why I'd need a timer in my web browser for 5 days, and you be right to do so.
However, I will concede it is indeed rather buggy. A Google search of "timer 3 minutes" does nothing for me, as it just performs a normal search with no timer widget. A search of "timer 2 minutes" or "timer 4 minutes" works fine.