Whenever you start packing, you may want to do it when he is in daycare. My mom was unpacking things from boxes faster than we could pack them and had to look at everything. Much easier on last move when she was not in the mix.

I don't fully know your situation but I tell my husband with ALZ not to far in advance, as he will forget the info but be worried and upset. I also reassure him that all is taken care of and he just needs to know I will be with him and everything is ok. I then try to keep him engaged and busy with things he likes to do. Simplify and reassure works with John. Sending support. Take care.

I like Helen5's celebration approach. Definitely setting a positive tone.

You should also keep in mind this will be new for him and may cause him to progress in some way 🌹😊

First, Congratulations! That's a long wait and this is good news!

If it was me, I would let him know about the good news, as soon as possible, to give him time to absorb it. Maybe have a small celebration with a cake or cupcakes when you tell him, to make it more festive and more memorable, so the information "sticks". The packing-up process alone will be a big change for him, so it's best for everyone to maintain a very happy and positive tone throughout the move. Hopefully he'll go with the cheerful tone you set and will feel happy about it.