3 calculators in this category
- Moon Phase CalculatorMeeus, Astronomical Algorithms, chapters 48 and 49Give this calculator any date and time and it returns the Moon's age in days since the last new moon, the percentage of the…
- Next Full Moon & New Moon CalculatorMeeus, Astronomical Algorithms, chapter 49 (phases of the Moon)Pick a reference date and a phase, and this calculator returns the exact instant that phase next occurs — in Universal Time, in…
- Equinox & Solstice Date CalculatorMeeus, Astronomical Algorithms, chapter 27 (equinoxes and solstices)An equinox or solstice is the instant the Sun's apparent geocentric longitude reaches an exact multiple of 90° — 0° in March…
Which one do you need?
- Moon Phase Calculator
- Find the Moon's age in days, illuminated percentage and named phase for any date and time, with the exact instants of new, quarter and full moon for that lunation.
- Next Full Moon & New Moon Calculator
- Find the exact instant of the next new, first quarter, full or last quarter Moon from any date, with Universal and local times, lunation numbers and a phase table.
- Equinox & Solstice Date Calculator
- Compute the precise instants of the March and September equinoxes and the June and December solstices for any year, with local times and the length of each season.