Enter your last period's start date and your average cycle length to see how your cycle currently aligns with the Moon — through the Western White Moon / Red Moon archetype, and through the Traditional Chinese Medicine Four Phases.
A note on what this is: this tool reflects cultural and symbolic traditions — the White/Red Moon archetype (rooted in various indigenous fertility traditions and popularised by Miranda Gray's writing) and the TCM Four Phases (a genuine framework from Chinese medical theory). It is not a medical, fertility or contraceptive tool, and individual cycles vary naturally in length and regularity. Nothing entered here is stored or sent anywhere — all calculation happens in your browser.