sentences: 1 month is equal to 28-31 days
docs: month_of_january has 31_days march has 31_days january has 31_days and has 31_days months_of_31_days is considered_long_months. october has thirty_one_days february has 28_or_29_days october has 31_days may has 31_days month_of_august has thirty_one_days