plag
This method returns the time of plag hamincha (the earliest time that Shabbos can be started) based on the opinion of Rabbi Yaakov Moshe Hillel as published in the luach of the Bais Horaah of Yeshivat Chevrat Ahavat Shalom that that plag hamincha is calculated as 1.25 shaos zmaniyos before tzais 3.8˚ with shaos zmaniyos calculated based on a day starting at alos 16.1˚ and ending at tzais 3.8.
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.
See also
.getMinchaKetanaAhavatShalom