A date's day of the year.
The day of the year upon which an OI date falls.
|Date||A date in OI internal format. (REQUIRED)|
The "DayOfYear" service returns the day of the year in which an OI date occurs. For example, if an OI date represents March 30, 1978, this service would return 89, since this date would be the 89th day of the year 1978. Leap years are taken into account. If the given date not valid, "" is returned.