Moon Phase Calculator


Pick A Date

Moon Calendar

Use the calendar below to determine the moon phase for past and future dates.

Or enter a date:

How to use the calculator

The page will display today’s moon phase automatically, along with some data about our natural satellite. 

Next, you will need to pick a date for which you want to see the moon phase. This can be any date in the past, present, or future. To do so, you can either use the calendar or enter the exact date in the form field.

Then click on “Calculate Moon Phase”.

The calculator will display the moon phase for the date you entered, along with a brief description of the phase. You may also see an image of the moon to help visualize the phase.

What's the purpose of this calculator


The brightness of the moon can affect the visibility of celestial objects in the night sky. Stargazers may use a moon phase calculator to help determine the phase of the moon on a particular night, and to plan their stargazing activities accordingly.

Astrology and spirituality

Some people believe that the phase of the moon can have an impact on their mood, behavior, or well-being. A moon phase calculator can help them determine the phase of the moon at a particular time, which they may use to guide their actions or rituals.

Moon Cycle Gardening

It is believed that planting during certain phases of the moon can improve the chances of success for certain crops. It’s important to note that the influence of the moon on plant growth is not a scientifically established fact. However, many gardeners swear by moon-phase gardening as a way to optimize their efforts and improve the success of their crops.


Some fishermen believe that the phases of the moon may affect the behavior of certain types of fish, although this has not been scientifically proven. The tides, which can be stronger or weaker during different phases of the moon, may influence the behavior of fish.

For example, some species may be more active during high tides when the water is deeper and cooler, leading to improved fishing conditions and higher catch rates.

Educational purposes

Students and educators may use this calculator as a tool for learning about the Moon.