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There are 31 days in July every year. It doesn't matter if it is a leap year there will still be 31 days.
July 31, 1978 was a Monday.
July 31 1958 was a Thursday
July 31 1951 was a Tuesday.
31st July 1965.July 31 -- same as Harry Potter.July 31, 1965She was born on July 31 1965.