I like weeks. Just 52 every year. Leap year agnostic.
I have a notebook for self reflection. Week-based. Since it is not a diary I call it septimary. Unlike a diary, the septimary gives me flexibility and every week I summarize something without mentioning specific dates or days unless this level of detail is really required by the context or significance of what needs to be written down.
Week 7 of year 2025 comes to an end.