April Fools' Day - Wikipedia, the free encyclopedia
1 Origins 2 Longstanding customs 2.1 United Kingdom 2.2 Ireland 2.3 Poland 2.4 Norway, Denmark and Sweden 2.5 April fish 3 April Fools' Day pranks 4 Comparable prank days 5 Reception 6 Cultural references 7 See also 8 References 9 Further reading 10 Exter...