shaah
Method to return a shaah zmanis (temporal hour) according to the opinion of the Magen Avraham (MGA) based on alos being 120 minutes zmaniyos before sunrise. This calculation divides the day based on the opinion of the MGA that the day runs from dawn to dusk.
Dawn for this calculation is 120 minutes zmaniyos before sunrise. Dusk is 120 minutes zmaniyos after sunset. This day is split into 12 equal parts with each part being a shaah zmanis. This is identical to 1/6th of the day from sunrise to sunset.
Since zmanim that use this method are extremely late or early and at a point when the sky is a long time past the 18 point where the darkest point is reached, zmanim that use this should only be used lechumra such as delaying the start of nighttime mitzvos.
Return
the long millisecond length of a shaah zmanis. 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 Long.MIN_VALUE will be returned. See detailed explanation on top of the AstronomicalCalendar documentation.