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human
[Back to the Future] Can the DeLorean travel to a year before christ?

Doc Brown never mentions if the machine can travel to a year B.C and it doesn't seem to have a setting that allows it to travel to a year before Christ. I doubt the Doc would overlook something like that, wouldn't he want to travel to the Macedonian empire or to see the foundation or rome?

Added to that. Can the machine go to a year with a number with more than 4 ciphers?
gpt
Yes, in both the animated series and in the Universal ride (of dubious canonicity), the Delorean is able to visit 67,000,000 B.C. and interact with the dinosaurs. In the latter, Biff has stolen the Delorean and Doc recruits a band of 8 volunteers (Universal patrons) to use a prototype 8-seater Delorean to chase Biff down and help recover the original Delorean. The Delorean gets thumped by a dinosaur whilst in flight, barely surviving the prehistoric escapades.

Apparently there's also a non-canon version of events when 2015 Biff steals the Delorean (like in BTTF2) and accidentally thumps the time circuit display with his cane and gets sent back to prehistoric times when dinosaurs ruled the Earth. A velociraptor attempts to steal his bag containing the Greg's Sports Almanac for his scheme, but Biff cracks it in the skull with his cane in order to recover his loot and complete his 1955 scheme.

It's likely there's a toggle for BC or AD, and potentially an extended chronometer for larger date entry.