Forever Journal
I have been using the "forever journal" approach for a long time now and find that it fits in well with the Forever Notes approach. Think of it a a daily, or monthly time frame instead of a weekly time frame.
Each day I pull that days "date" out of my monthly note. So for today I pulled 01-December out of my note containing all of the days for December. Under 01-December I have all of my appointments, tasks and any notes for that specific day (Bullet Journal Style). 01-December is a link to a note >>01-December and each year I add that days journal entry to that note. This gives me a Forever Journal where I can see what journal entries I made for December 1st over the years.
Works for me and seems to fit into the Forever Notes approach concept.