A datetime's day.
The day component of an OI datetime.
|Datetime||A datetime in OI internal format. (REQUIRED)|
The "Day" service returns the day component of an OI datetime. The day component would the day of the datetime's month and year, e.g., if an OI datetime represents March 30, 1978 at 12:41pm, this service would return 30. If the given datetime is not valid, "" is returned.