datetime.datenum
datetime: N = datenum (T)
Convert datetime array to serial date numbers.
N = datenum (T) returns a double array N
of the same size as T holding the serial date number of each
element, where 1 corresponds to January 1 of the year 0000 and the
fractional part represents the time of day. The time zone of a zoned
T is ignored; its wall-clock components are used. Not-A-Time
(NaT) values are returned as NaN, and infinite datetimes
preserve their sign.
A serial date number has no room for an inserted leap second, so for a
'UTCLeapSeconds' array the 60th second of a minute folds backward
onto the 59th: datenum of 2016-12-31T23:59:60Z equals that
of 2016-12-31T23:59:59Z.
Source Code: datetime
datenum returns the serial date number — days since the start of the year 0 — with the time of day in the fractional part.
t = datetime (2024, 3, 9, 6, 0, 0)
t = datetime 09-Mar-2024 06:00:00
datenum (t)
ans = 7.3932e+05