weekday

Format: weekday( sernum )

Arguments: (time) sernum Optional date and time serial number; default = now

Returns: (text) Day of the week implied by sernum (e.g., Sunday, Monday, etc.)

Note: The serial number used by all date and time primitives is the number of seconds that have elapsed between an arbitrary base date and the specified date and time. Dates before the year 1584 are not valid.

The serial numbers returned by the datenum and now primitives include the time unit of measure. Use formulas including the units years, months, days, hours, minutes, and sec to modify date serial numbers.

Examples: weekday(datenum(1992,7,18,9,15,10)) = Saturday

weekday = current day of the week

weekday(now+100days) = day of the week 100 days from now

See Also: datenum, now, date, time, year, month, day, hour, minute, second