sof
This method returns the latest time one is allowed eating chametz on Erev Pesach according to the opinion of the Magen Avraham (MGA) based on alos being 72 minutes before sunrise. This time is identical to the Sof zman tfilah MGA 72 minutes. This time is 4 shaos zmaniyos (temporal hours) after dawn based on the opinion of the MGA that the day is calculated from a dawn of 72 minutes before sunrise to nightfall of 72 minutes after sunset. This returns the time of 4 * shaahZmanisMGA after dawn.
Return
the Date of the latest time of eating chametz. If the calculation can't be computed such as in the Arctic Circle where there is at least one day a year where the sun does not rise, and one where it does not set), a null will be returned. See detailed explanation on top of the AstronomicalCalendar documentation.