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?
According to Zager and Evans, the year 9595 will pretty much be it.
https://piped.video/watch?v=zKQfxi8V5FA
Never thought I’d see that song as being optimistic