I think I might've tried changing Initial Time higher at some point, and I don't recall that working. The Adventure values are definitely lower than the Time Elapsed portion already, too. 200 hours played versus 807 days passed on the RTC.
Ugh, I wish there was more documentation on this, it seems like the furthest people get through documenting this is replacing the battery, not knowing what to do and then just resetting their save anyway, which I really don't want to do because I've already poured a ton of hours into grinding through stuff like the Battle Frontier, let alone Pokémon like my Shiny Rayquaza and Geodude which are too precious to lose, and I'd rather not spend hours moving everything to FR.