From Twitter in response to the 9121-1900 problem, the explanationis:
Coronavirus Updates - Alexander Higgins
@kr3at
·
2h
Replying to
@Mrtdogg
and
@MuffetTesterman
As a programmer, this is a software programming glitch. Null Date values are converted to 1/1/1900. That means these voters that voted where eithet never registered to vote or never had their voter registration date recorded in the system.
/
Looks like someone forgot a Y2K update!
not Y2K - a “null” value (meaning not present, they were not real people or non-registered voters)