This is obviously a joke, but here's a serious reply to it: There will already be serious Y10K problems in 9997, just like there were Y2K problems earlier than

This is obviously a joke, but here's a serious reply to it: There will already be serious Y10K problems in 9997, just like there were Y2K problems earlier than 1997. Epochs & date formats aren't only used to represent & display the current date, but dates in the future, e.g. think about reservation systems, graphing libraries that display things 10-15-50 years in the future etc.