April Fools Day Prank

Most of the people might not know how April Fools Day first comes about. So do I. April Fools' Day although not a holiday in its own,it is a day celebrated in many countries on April 1. Traditionally, in some countries, the jokes only last until noon like UK, Australia, New Zealand, Canada and South Africa, someone who plays a trick after noon is called an "April Fool". Elsewhere, such as in Ireland, France, and the USA, the jokes last all day. The origin of April Fools is obscure and having a lot of different version. I had planned and played a prank on my housemates. Here is victim 1:Ang XXX XXX

Victim 2: NG XXX XXX

Mr. Ng birthday was on the 30th March. However, we decided to celebrate his on April1[ to be honest, we forgot his birth date -.- ]. Here goes the story, Mr. Ng is invited to join the birthday celebration of Mr Ang on the day [which is not his birthday]. As usual, knocked on the door -> open door -> yay! surprise -> singing
"Happy birthday to you!
Happy birthday to you!
Happy birthday to .....Mr. Ng!
Happy Birthday to you!"

Ok, his reaction upon it, I gives 100 marks. Meanwhile Mr. Ang didn't respond much[ lousy response or undesired feedback in engineering terms]. So thats the end. Lame~~~~~~~~~