mincha
This method returns the latest mincha gedola,the earliest time one can pray mincha that is 6.5 * shaos zmaniyos (solar hours) after sunrise or sea level sunrise (depending on the isUseElevation setting), according to the GRA. Mincha gedola is the earliest time one can pray mincha. The Ramba"m is of the opinion that it is better to delay mincha until .getMinchaKetana while the Ra"sh, Tur, GRA and others are of the opinion that mincha can be prayed lechatchila starting at mincha gedola. The day is calculated from sea level sunrise to sea level or sunrise to sunset (depending on the isUseElevation setting).
Return
the Date of the time of mincha gedola. 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.