September 22

''See also The '''Timelinepre-crash''' and '''TimelineSeptember 2004''' timelines for events before, on, and after September 22, 2004 in the Lost chronology.''

* September 22, 2004 is the date when Oceanic Flight 815 left Sydney Australia bound for Los Angeles, CA
* September 22 is the autumnal equinox, the date when night and day are nearly of the same length and the sun crosses the celestial equator (i.e., declination 0) moving southward (in the northern hemisphere). In the southern hemisphere, the autumnal equinox corresponds to the center of the Sun crossing the celestial equator moving northward and occurs on the date of the northern vernal equinox. The autumnal equinox marks the first day of the season of autumn.
* The show first aired in the U.S. on September 22, 2004.