Written by Every sabbat deserves a dedicated section in your grimoire. Not just a note of the date, but the full record of what the festival carries. Its mythology, its correspondences, its ritual structure, its specific magical applications, and the personal record of how you celebrated it and what it produced.
This is the Beltane entry for yours.
Use it as a reference, a starting point, and a template. Write your personal practice into the margins, the pages after, the sections you add over years of working with this festival. The grimoire that grows with your practice is always more valuable than the one that is perfectly complete before you begin.