plag
This method returns the time of plag hamincha based on the opinion that the day starts at alos 16.1˚ and ends at tzais. 10.75 shaos zmaniyos are calculated based on this day and added to to reach this time. This time is 10.75 shaos zmaniyos (temporal hours) after dawn based on the opinion that the day is calculated from a dawn of 16.1 degrees before sunrise to tzais . This returns the time of 10.75 * the calculated shaah zmanis after dawn.
Return
the Date of the plag. If the calculation can't be computed such as northern and southern locations even south of the Arctic Circle and north of the Antarctic Circle where the sun may not reach low enough below the horizon for this calculation, a null will be returned. See detailed explanation on top of the AstronomicalCalendar documentation.