Separate the calendar from its interpretation
Choose the full moon calendar for a listed event time, and the Moon phase tool for a visual overview of a selected date. Their methods differ: the phase tool uses a simplified lunar-cycle calculation. Do not treat its illumination or sign estimate as a precision measurement, or use it to plan eclipse observation.
Check the time label before adding an event to your calendar. A peak listed just after midnight UTC can fall on the previous local date farther west. A full moon's peak is also different from local moonrise; this collection does not provide location-specific moonrise or moonset times. The U.S. Naval Observatory phase service provides astronomical phase times for a selected year.
For a reflective exercise, choose one date and note something you want to begin, review or finish. The ritual theme is optional symbolism, not a claim that a lunar phase causes an event in your life. The birth Moon phase calculator explores the same idea for a birth date. Neither it nor a retrograde schedule determines when you should make a medical, financial or relationship decision.