Gunnm
"Battle Angel Alita" is eventually revealed to take place in the 26th century. The sequel "Battle Angel Alita: Last Order" introduces a calendar era called "Era Sputnik" which has an epoch of AD 1957. The original "Battle Angel Alita" series begins in ES 577 (AD 2533) and ends in ES 590 (AD 2546), "Battle Angel Alita: Last Order" is mostly set roughly in ES 591 (AD 2547), and "Battle Angel Alita: Mars Chronicle" currently alternates between ES 373–374 (AD 2329–2330) and ES 594 (AD 2550).