It seems like it’d get increasingly impractical as the years go on to hundreds of thousands and millions of years to write them out that way, but then…I guess technically one may already do this with the preceding years, so future’s fair game for it?
The integer is signed, when it overflows it doesn’t go to 0, it goes from Max Positive Value to Max Minimum Value, which will be a very ‘large’ negative number (-2147483648 to be exact).