Time Calculator
Apr., Jun., Sep., Nov.—30 days. Feb.—28 days for a common year and 29 days for a leap year: week: 7 days: day: 24 hours or 1,440 minutes or 86,400 seconds: hour: 60 minutes or 3,600 seconds: minute: 60 seconds: ... This constituted the 24 hours that would later be known as equinoctial hours and would result in days with hours of equal length.