Quite unusual, and according to family my late grandfather was born on a leap year day - 29 February 1888, but no one has had any luck tracing his birth registration over a period of 7 years.
However, within my 2010 Diary from my Regimental Association, I have the full details of how to calculate which day for every date from 1800 to 2050 and that has produced some interesting facts about the days some of my rellies got married in the 1800's.
Brian