It's April Fool's Day , meaning it's the one day of the year where we all agree it's perfectly ok for us to be completely cruel and pull pranks on those we love the most.
Even better, we get away with said pranks because of a weird ancient tradition, and we all know you don't mess with those (see Indiana Jones).
We've rounded up a few of the best pranks for you to have a go at - just remember doing any of these after midday on April 1 is against the rules.
Also, if you're not sure a colleague will see the funny side, it's probably best not to bother.
If you're looking to have a laugh at someone else's expense, you could do worse than to try these out.