<P> February 30 (or 30 February) occurs on some calendars but not the Gregorian calendar, where the month of February contains only 28 days, or 29 days in a leap year . 30 February / February 30 is usually used as a sarcastic date for referring to something that will never happen or will never be done . February 31 may also be used in such a fashion . </P> <P> February 30 was a real date in Sweden in 1712 . </P>

How many times in 4 years does february have 30 days
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