tzais120
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 (nightfall) based on the calculations of Rav Chaim Naeh that the time to walk the distance of a Mil according to the Rambam's opinion is 2/5 of an hour (24 minutes) for a total of 120 minutes based on the opinion of Ula who calculated tzais as 5 Mil after sea level shkiah (sunset). A similar calculation uses degree-based calculations based on this 120 minute calculation. Since the zman is extremely late and at a point that 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.