: why are some months 31 days or 30 days and why can’t they all be the same.
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Take 365 days.
Now divide it by 12.
You get 30.42. Quite awkward! If all months were the same length, you’d either have an extra week dangling off the end of the year or you’d come up short! Of course you can’t change the number of days in a year, since its synced to the planet’s orbit. A year with 372 days would result in the seasons slowly drifting around (good old snowfall in the US in July, eh?). In fact they already do because the 365 days thing isn’t perfectly spot on – that’s why you need leap years.
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