Mm..if you expect any 'maths class' here, you are for a disappointment (but it is at the end of this thread :biggrin2: :hide But you are going to receive some 'sweet, yummy facts' about its namesake celebration. Yesterday my dd and ds, told me that in their school, Pi(e) day is being celebrated and they need to buy some pies from the store, so that they can have a party at school..they gave their choice of pies too..:drool This morning, my ds, forgot about his pie and was about to leave and I screamed, "take your pie to school"...and in came he to get only the pie, but I also told him take it with the பை (in tamil this letter is also pronounced as 'pie' but means the 'bag')..he got :spinfor a minute and at last figured it out, what I meant and he took it in the bag. This is the problem you know, when you speak two languages at the same time....:bonk:rotfl After they left to school, my mom asked me to explain about what is this all about.. pi(e) day..(um..she didn't know that I am not good at explaining especially the math part) so I went to Wikipedia and got the help.. I also found out that they celebrate Square root day, too...(they celebrate it by cutting the 'root vegetables' in squares and have it)..:idea: After seeing these Pi(e) day and Square Root day, my son was asking me, do they have any Addition day, Subtraction Day, Multiplication day, Exponent day and the like, I ran to Wikipedia for help, but couldn't find any. As such my mind was thinking about it and got an explanation to the question. Every marriage or birth, (including the adoption of pets) to the family...is the Addition/Multiplication Day. Every separation or death, in the family...is the Subtraction/Division Day. Each and every family celebrates/remembers these days, aren't we! Sriniketan PS: Pi Day is a holiday commemorating the mathematical constant π (pi). Pi Day is celebrated on March 14 (or 3/14 in month/day date format), since 3, 1 and 4 are the three most significant digits of π in the decimal form. In 2009, the United States House of Representatives supported the designation of Pi Day. Square Root Day is an unofficial holiday celebrated on days when both the day of the month and the month are the square root of the last two digits of the year. Square Root Day occurs on the following dates each century: 1/1/01 2/2/04 3/3/09 4/4/16 5/5/25 6/6/36 7/7/49 8/8/64 9/9/81 Did you enjoy this class... and one more question before I finish this class off..:help: do any of you celebrate your birthdays,( can expect a square cake, though..) in square root days..to make it simple..where the dates and months are the same?