I would suggest using a statically generated blog for this. You could even have individual posts for the days things occurred, as opposed to rolling it all into one email every few months (although that one email may be better composed than the individual posts).
Somewhat similar: For over a decade now, I've had an automated means of photos being sent from my phone to the PC, and eventually into blog posts. It will scan the photos, and generate a post for each day there is a photo - putting all the photos of that day in the blog entry. I can select which photos to keep, and put any captions on them.
My captions aren't well thought out compared to this approach, though. But if I did want to make the 3-4 emails per year like the submitter day, it's really handy to have all the photos in individual blog posts. I just go through them and get a record of what we've been up to in the last few months.
Somewhat similar: For over a decade now, I've had an automated means of photos being sent from my phone to the PC, and eventually into blog posts. It will scan the photos, and generate a post for each day there is a photo - putting all the photos of that day in the blog entry. I can select which photos to keep, and put any captions on them.
My captions aren't well thought out compared to this approach, though. But if I did want to make the 3-4 emails per year like the submitter day, it's really handy to have all the photos in individual blog posts. I just go through them and get a record of what we've been up to in the last few months.