関連ワード:
month has 30 or 31 days is month 30 or 31 days check if month has 30 or 31 days python check if month has 30 or 31 days c# javascript check if month has 30 or 31 days php check if month has 30 or 31 days determine if a month has 30 or 31 days knuckles determine if a month has 30 or 31 days do most months have 30 or 31 days do more months have 30 or 31 days
