tzais120Zmanis
Deprecated
This method should be used <em>lechumra</em> only since it returns a very late time, and if used <em>lekula</em> can result in <em>chillul Shabbos</em> etc. There is no current plan to remove this method from the API, and this deprecation is intended to alert developers of the danger of using it.
This method should be used lechumra only and returns tzais (dusk) calculated using 120 minutes zmaniyos after sea level sunset. Since the zman is extremely late and at a point when the it is long past the 18 point where the darkest point is reached, it should only be used lechumra, such as delaying the start of nighttime mitzvos.
Return
the Date representing the time. 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.