Julian day of a calendar date (Meeus eq. 7.1). Valid for any year; dates from 1582-10-15 on are Gregorian, earlier ones Julian.
julianDayFromCalendar({ year: 1957, month: 10, day: 4.81 }); // 2436116.31 Copy
julianDayFromCalendar({ year: 1957, month: 10, day: 4.81 }); // 2436116.31
Julian day of a calendar date (Meeus eq. 7.1). Valid for any year; dates from 1582-10-15 on are Gregorian, earlier ones Julian.