https://erinflotodesigns.com/collections/metal-stencils/products/bullet-journal-monthly-circle-tracker-stencil-habit-tracker-stencil-unique-design-stencil-cleaning-tracker-stencil

Erin Floto has a metal stencil for a chronodex circular design for use in bullet journals. It's a form of circular calendar with the inner circle containing space for daily, bi-weekly, weekly, monthly and longer time horizons with succeeding rings of the circle containing space for data related to the inner categories. Some of the exterior rings also include numbered squares representing days of the month or week on which a task should be done or for which a habit on an interior part of the circle might be tracked.

The chronodex, a portmanteau of chrono (time) and index, idea is fairly simple, but can be quite complex. For actual use, one may need to be able to spin the visualization around to read and understand it.

Other stencils with habit trackers, etc: https://erinflotodesigns.com/collections/metal-stencils