My July 2020 wedding was postponed to July 2022. Once we made the decision to postpone (6 weeks prior to our original date), we immediately sent out postponement announcements so everyone could cancel their travel plans and be aware that the wedding would not occur that day. At the time we sent out the announcements, we didn't know what our new date would be, so we stated on the cards that we were working to reschedule, and that we hope to announce our new date soon.
Now, we officially picked a new date in 2022, and haven't sent anything out to formally announce it yet. Do we send Change The Date cards now? Or do we wait until time gets closer (early 2022) before sending out the new date? If we send them now, should we also send a second Save The Date in early 2022 (a year and a half from now)?