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The changing sky

Moon phases in January 2027

Every primary phase in this UTC month. Open the calendar to see where each event falls.

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Primary phases in January 2027

All times use UTC and are shown to the minute. Your local date can differ.

  2. First quarter

    View this date's sky

  4. Last quarter

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See the whole month

Phase symbols are schematic. Their orientation does not represent the Moon's appearance from your location.

  7. New Moon
  15. First quarter
  22. Full Moon
  29. Last quarter
How these dates are calculated

Primary phases occur at Moon-Sun longitude differences of 0°, 90°, 180° and 270°, viewed from Earth's centre. They are shared astronomical instants.

astronomy-engine 2.1.19 · moon-phases-v1. This calendar covers the current UTC month and the following 11 months.

Independent checks cover all 149 primary phases in the U.S. Naval Observatory tables for 2023, 2024 and 2026. Differences were under 2 minutes. Other years are not independently checked here.

U.S. Naval Observatory phase tables · Astriel's calculation methods

Phase times alone do not predict a personal event or say whether the Moon is visible at your location.