Why 2012 is a leap year and what is one [infographic]

A leap year a year where we have 29 days in February. Every four year we add an extra day to the calender. Normally a solar year is 365 days four hours and some minutes, but the calender is only 365 days.

If we would not add that extra day every four years we would have a difference of 24 days in only 100 years. Read on about the interesting fact regarding leap years.
Link via Tech Blog.
Cheap Sally Leap Year 2012 Infographic