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What and why do we have leap years

What and why do we have leap years

(7:00) 2012 is a leap year, meaning February has 29 days rather than 28. Astronomer Dr Meghan Gray explains leap years, Julian dates and Star Trek's fictional stardate.

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cengland0 cengland0 (2087 days ago)
Latest comment: Beware September 1752 when converting dates from one calendar to another. If I'm not mistaken, I remember it jumps from Wednesday September 2, 1752 to Thursday September 14, 1752. There are days missing in between so you need to know that when doing your calculations.
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Latest comment: Beware September 1752 when converting dates from one calendar to another. If I'm not mistaken, I remember it jumps from Wednesday September 2, 1752 to Thursday September 14, 1752. There are days missing in between so you need to know that when doing your calculations.
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Guest: (2091 days ago)
A lovely little piece for all us nerds. BTW how does JD deal with the conversion from Julian to Gregorian calendar? And is it counting sidereal days or the other kind whose name I don't know? I guess I could ask google and find out, but I just wanted to look smart.
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A lovely little piece for all us nerds. BTW how does JD deal with the conversion from Julian to Gregorian calendar? And is it counting sidereal days or the other kind whose name I don't know? I guess I could ask google and find out, but I just wanted to look smart.
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