April 29, 1979 –

ABC TV cancelled the series Battlestar Galactica earlier in the month, making the episode that aired on this date, The Hand of God, the last episode of the series.
Apollo reveals that the Galactica was launched “over 500 yahren ago.” According to BattlestarWiki, fans have established a “yahren” (equivalent to a Colonial year) as being equivalent to approximately 250 Earth days, or a little more than 2/3 of an Earth year. That still makes Galactica an extremely old ship at over 340 Earth years old. In terms of Earth history, it would be like continuing to use a warship from about 1680 A.D.
