Why does February have 28 days?

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月是历法中的一种时间单位,传统上都是月相变化的周期作为一个月的长度。阳历分大月和小月,大月31天,小月30天,可2月只有28天,而有的月份又是29天。至于原因,一切还要从古罗马时代说起……

It's AumSum Time.

Why does February have 28 days?

Many centuries back, a Roman King called Numa made a calendar according to 12 lunar cycles which approximately take 354 days.

But as even numbers were considered unlucky, Numa rounded off days to 355.

He also made each month odd-numbered, leaving one month. That is Februaries with 28 days to reach the total of 355.

But as the earth takes 365.24 days to travel around the sun.

Seasons and weather conditions started mismatching with the 355-day calendar.

Then came Julius Caesar who decided to follow the solar calendar of the Egyptians that had Januaries and Februaries in the beginning.

He made the calendar into 365 days by adding days in each month except February.

As still 0.24 days were pending each year, after every 4 years, he added 1 day to February.

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