April Fool's Day

On each 1st of April reports appear on British TV and in the press that turn out to be jokes. 

Perhaps the most famous report was the one about spaghetti trees!

Read about it here
http://projectbritain.com/year/aprilfools.html

Watch it here

http://www.youtube.com/watch?v=27ugSKW4-QQ

This link is about 10 strange things that are actually true!  

 http://www.bbc.co.uk/news/magazine-12932108 

You can read more about each story in a variety of British newspapers.

Words associated with April Fool's Day are hoax and prank.   
How would you translate those in your language?