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Men's Weekly

How a seasonal snarl-up in the mid-1500s gave us our strange rules for leap years

  • Written by Jonti Horner, Professor (Astrophysics), University of Southern Queensland
How a seasonal snarl-up in the mid-1500s gave us our strange rules for leap yearsshutterstock

Happy February 29! It doesn’t come round very often, so make sure you enjoy it.

But why do we have these extra days? Well, if we didn’t, the seasons would gradually move around the calendar. Rather than midsummer in the southern hemisphere falling around December 21, it would arrive in January, then February, and so on....

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