A proper plan beats a vague group chat
The people worth inviting to an anniversary span decades โ friends from before the couple met, relatives who drove the distance last time, colleagues from a different chapter of their working life. A group chat buries the details, and half of the guest list won't even be in it. One page that the whole list can open does the job instead, and stays true when the venue or the time moves.
There is no dedicated anniversary design in My Joyfullday yet. You start from the closest celebration setup and change every word to the occasion, and the tools come with it: a shareable event page, replies tracked against names, reminders for the quiet ones, and a place for guests to upload photographs. A birthday or wedding gathering uses the same machinery, which is exactly what an anniversary evening needs.