Why timestamps can't be negative

[alfaproject]

parquets/src/types.ts

Line 355 in 1cabcd2

if (v < 0 || isNaN(v)) {

The original libraries where this was forked from suffer from the same issue. For some reason they have a negative check on the timestamp conversion but timestamps can obviously be negative. Any date before 1970 is going to be negative and that's fine.

Any particular reason why this hasn't been fixed anyone in so many years? Just curious o: