memoir. Download on the App Store
English

A MOMENT TO YOURSELF

Is tonight a full moon?

Look up an estimated phase and use it as a starting point for observing the night sky. Weather, your location, and the time of night affect what you can see.

Your writing and answers stay on this page. They aren’t sent to us or saved automatically. Copy or download what you want to keep before closing or reloading the page.

How to use this tool

  1. Select a date to estimate the phase at 20:00 UTC.
  2. Browse the calendar to see the approximate cycle.
  3. Record what you actually observe in your journal.

Read more: NASA’s guide to moon phases.

Common questions

How accurate is this estimate?

It uses a mean 29.530588853-day lunar cycle from a reference new moon. Real lunar motion varies. Dates can differ by about a day or more; this is not an astronomical ephemeris or an exact full-moon timetable.

Does a full moon determine how I feel?

This tool makes no claim that moon phases cause a particular mood. You can record your experience without assuming a connection.

Keep the thought going

Find another writing prompt, explore writing in memoir, or learn about tracking your moods in the app.