chatzos
This method returns chatzos (midday) following most opinions that chatzos is the midpoint between sea level sunrise and sea level sunset. A day starting at alos and ending at tzais using the same time or degree offset will also return the same time. The returned value is identical to sunTransit. In reality due to lengthening or shortening of day, this is not necessarily the exact midpoint of the day, but it is very close.
Return
the Date of chatzos. If the calculation can't be computed such as in the Arctic Circle where there is at least one day 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.