Consistency is not perfection with a calendar.

Marking days on a calendar measures whether you showed up, which is useful, but it quietly implies that the goal is an unbroken row of marks. That turns a single blank square into a failure of the whole project. The calendar was meant to serve the commitment, and somewhere it started outranking it.

Keep tracking if it helps you, but decide in advance what a gap means. If a missed day makes you want to abandon the record, the record has stopped working for you and it is worth simplifying.