May day dates back to ancient times. The Druids called it Beltrane and it was thought that the day divides the year in half. The other half started on Nov. 1. The first of May was also a ancient Roman holiday. It was devoted to Flora the goddess of flowers.
It was not invented but selected it started on May 1866.
May 16th
DAY CAN NOT BE ANSWERED - But it was invented in 1891
which is the day of computer invented in 1786
Probably several things, but you may be thinking about the nickel (5 cent coin).
Well, really, it depends on the day you were conceived. If you were born conceived on 8th May, say, you were made on 8th May. See what I mean? Otherwise, you weren't really invented, unless, of course, if you are Adam or Eve!
valentines day was invented to celebrate with those you care about
It was invented in 1999
Valentines day wasn't invented actually it was a person. He was a person who gave love to the world and this is the day we celebrate it.
No one has actually come forth to say that he/she had invented opposite day. So anyone could say they invented it.
John Reh invented National Goof Off Day.
the day the T-Bag was invented lol