Except for Mobile Suit Gundam 00 (which follows the current calendar era), all mainstream Gundam series are set in a fictional era which begins after a drastic event or chain of events.
Kecuali Mobile Suit Gundam 00 (yang mengikuti era kalender sekarang), semua serial utama Gundam berlatar di era fiksional yang dimulai setelah peristiwa penting atau peristiwa beruntun.