mpas_analysis.shared.timekeeping.utility.datetime_to_days

mpas_analysis.shared.timekeeping.utility.datetime_to_days(dates, calendar='gregorian', referenceDate='0001-01-01')[source]

Given date(s), a calendar and a reference date, returns the days since the reference date, either as a single float or an array of floats.

Parameters:

datetime (instance or array-like of datetime.datetime) – The date(s) to be converted to days since referenceDate on the given calendar.
calendar ({'gregorian', 'noleap'}, optional) – A calendar to be used to convert days to a datetime.datetime object.
referenceDate (str, optional) –
A reference date of the form:
```
0001-01-01
0001-01-01 00:00:00
```

Returns:

days (float or array of floats) – The days since referenceDate on the given calendar.

Raises:

ValueError – If an invalid datetimes, referenceDate or calendar is supplied.