A simple "X" on a wall or desk calendar works perfectly for basic tracking.
For those who like a creative touch, a "period tracker" spread can include color-coded moods and habits. What to note each day: Flow intensity (Light, Medium, Heavy). Cramps or physical pain. Mood (Anxious, happy, irritable). Energy levels. Cervical mucus consistency (useful for fertility tracking). When to See a Professional menstrual cycle calendar
Using a menstrual cycle calendar will help you notice "red flags" early. Consult a healthcare provider if you notice: Cycles shorter than 21 days or longer than 35 days. Bleeding that lasts more than 7 days. A simple "X" on a wall or desk