When Does "GalaxyQuest" (1999) Take Place?
"GalaxyQuest" is a comedy science fiction film written by Robert Gordon with David Howard and released December 25th, 1999. So when is "GalaxyQuest" set?
We know this because, at the very start of the film, Guy Fleegman clearly says to the convention-goers that they had just enjoyed the only screening of "the lost 'GalaxyQuest' episode 92 two-parter since it was originally aired in 1982!" At the end of the movie, when an in-universe advertisement is played for the viewer as an epilogue, the voice-over clearly says, "back again after 18 years" referring to how much time has elapsed since "GalaxyQuest" (the TV show within the fictional world [diegesis] of the film), was off the air.
It takes place in the year:
2000 AD
We know this because, at the very start of the film, Guy Fleegman clearly says to the convention-goers that they had just enjoyed the only screening of "the lost 'GalaxyQuest' episode 92 two-parter since it was originally aired in 1982!" At the end of the movie, when an in-universe advertisement is played for the viewer as an epilogue, the voice-over clearly says, "back again after 18 years" referring to how much time has elapsed since "GalaxyQuest" (the TV show within the fictional world [diegesis] of the film), was off the air.
1982 + 18 = 2000.
HOWEVER, how much time has elapsed between the end of the main action of the plot and this epilogue isn't entirely clear.