Astronomical year numbering
Cassini gave the following reasons for using a year 0:
Fred Espanak of NASA lists 50 phases of the moon within year 0, showing that it is a full year, not an instant in time. Jean Meeus gives the following explanation:
Although he used the usual French terms "avant J.-C." (before Jesus Christ) and "après J.-C." (after Jesus Christ) to label years elsewhere in his book, the Byzantine historian Venance Grumel used negative years (identified by a minus sign, −) to label BC years and unsigned positive years to label AD years in a table. He did so possibly to save space and put no year 0 between them.
Year Zero (video game)
Year Zero is an alternate reality game (ARG) by American studio 42 Entertainment based on the Nine Inch Nails concept album of the same name, its expected follow-up, and a possible accompanying film or television project. Although the album was released on April 16, 2007 in Europe, and the following day worldwide, the game had been underway since roughly February 12, 2007 and was expected to continue for approximately eighteen months. The game was created by 42 Entertainment, the same group responsible for the "Halo 2" promotional alternative reality game "I Love Bees". Trent Reznor, frontman and sole member of the band, has called the game "a new entertainment form". In response to criticism regarding the promotion of the album, Reznor stated: