How many seconds in a day?

The correct answer is 60*60*24 or 86400 seconds.

But, sometimes people press these numbers in the wrong order, in this case 84600 (so half and hour shorter than it should be).

So, the above search shows 8,739 places, in open source code where the day is only 23.5 hours long :) Oops.

Shameless via https://news.ycombinator.com/