When do villagers move out?

[kamiyama34]

How long after you agree a villager should move do they go into boxes? Just curious, I'm about to be letting some of mine go and would like to give them away!

 

[moonolotl]

If you speak to them and they say theyre going to move away and you said yes, they should be in boxes the next day and then leave the following!

 

[Candybalism]

The next day they'll be in boxes!