Full moon exact time, usually in Coordinated Universal Time (UTC). Typical monthly calendars that include lunar phases may be offset by one day when used in a different time zone. Full moon is generally a suboptimal time for astronomical observation of the Moon because shadows vanish. It is a poor time for other observations because the bright sunlight reflected by the Moon, amplified by the opposition surge, then outshines many stars. On 12 December 2008, the full moon occurred closer to the Earth than it had been at any time for the previous 15 years, called a supermoon. On 19 March 2011,
Tishri-years the years from the Autumn season, around the Autumn Equinox (Gregorian September 22/23). The New Years Day of the Tishri-years is called "Rosh Hashanah" ("Head of the Year"); it begins the Fall Feasts of Israel. Tishri 1, however, is not determined directly by its relationship to the Autumn Equinox. It depends on the determination of Nisan 1, which is the day after the New Moon closest to the Spring Equinox (within fifteen days before or after). Tishri 1 is the first day of the seventh month. Although the month number is always counted from Nisan, in the Tishri-years, the year