Leaping Years

It's a Sunday today in the world and I find myself blah blogging away again on this day of rest, or it that Saturday, Sabado, the Sabbath, I can never figure it out. And this month is a leap year according to that Gregorian calendar. One of those years that I guess, leaps. And what the heck is a leap year anyway. I find that day and month of February 29, or is it the 28th very confusing. What does that leap year thing mean, that years leap, years fly away. As I understand a leap year occurs every four years. But what about those other three. And what about people who were born on the leap year day, or they four years less or more than they really are, and what day do they celebrate their birthday on, the 28th or the 29th. And what about the rest of the world, does it advance four years in time? What's the meaning of this holiday, is it an astrological, astronomical event where the stars in heaven should rearrange themselves and align themselves with the sun or something. I imagine Wikipedia, that internet bible dictionary would have an answer for this one. And whatever it's meaning, have a great leaping year day.