616 and 199999 develop their Gregorian calendars separate to each other; they are their own calendars. They are not made to align with each other. It is well established that the two calendars do not align due to time dilation. The Gregorian calendars on Earth and the Mushroom World align with each other, so it is unreasonable to assume they don't. Furthermore, no time dilation occurs in Mario Galaxy 1 & 2 due to the millennium event still taking place, which only happens every 100 years for a few days at most. If no time dilation occurs here, why would you assume it occurs for the Mushroom World and Earth, under the basis that you want games to happen close together
The only event that definitively takes place in both the Paper and regular universes is Super Mario Bros. (and Paper Jam, I guess, but that's different). While it can be assumed that the Paper universe is similar to the normal world, clearly not every event that ever occurs is the same, otherwise there's no point in even establishing they're separate universes. Since the Paper Universe is a book, it can be assumed that most - if not all - normal world events occur in the Paper Universe, but not all Paper Universe events occur in the normal world.