Will changing the time on 3DS affect anything with Pretendo?

So basically I haven’t played ACNL in 27 days and I’m worried that my fave villagers will be gone when I play again. My only solution is to change the clock back to 27 days ago, and I know this might mess with a few of my 3DS games as well as the activity log, but I really need to go back so I can ensure my villagers will stay.
My plan is to first start by changing the date to about a day since i last played, talk to all villagers and make sure no one’s thinking of leaving, then changing to another 5 days later and check villagers, then repeat until I reach the current day.
But I just want to know, can this affect any pretendo features, including StreetPass Relay?

I’m fairly sure that’s a no. StreetPass Relay shouldn’t get affected afaik.