Dictionary term
Moonset
Direct answer
Moonset is the calculated instant when the Moon's upper limb disappears below the observer's horizon under standard rise-and-set assumptions.
Moonset is the local horizon time when the Moon finishes setting.
- Source
- The Great Almanac Dictionary
- Category
- Seasons & Earth Almanac
- Also appears in
- Seasons & Earth Almanac
- Aliases
- None listed
- Last updated
- 2026-07-15
Quick reference
- Use when
- Use Moonset with local coordinates, phase, date, and time zone, especially when planning meteor or deep-sky observation.
- Do not use it for
- Do not treat a geometric set time as exact for an obstructed horizon.
- Reference category
- Seasons & Earth Almanac
- Related terms
- Astronomical Season, Meteorological Season, Equinox, Solstice
The story behind Moonset
Moonset tables became a routine part of astronomical and navigational almanacs because the event depends on lunar motion and observer location.
Moonset in spiritual tradition
Moonset reminds the observer that darkness itself has changing local conditions.
The Great Almanac frames Moonset with educational restraint. Mystical or symbolic language may be meaningful, but it should not be exaggerated into certainty, panic, or permission to ignore ordinary responsibility.
Moonset in the Bible
This is a factual astronomy, calendar, Earth-science, cultural, or historical reference. It can support wonder at the created order without becoming a claim of fate, worship, or private revelation.
Moonset in numerology
Moonset is not a numerology claim. Any numbers attached to it should retain their ordinary scientific, calendrical, navigational, or historical meaning unless a separate symbolic interpretation is clearly labeled.
Why Moonset matters
Moonset determines dark-sky windows and explains whether Moon light will interfere with evening or predawn observing.
Example in a reading: Observers may wait until after a bright Moon sets to see fainter meteors or the Milky Way.
Interpretive caution: Do not treat a geometric set time as exact for an obstructed horizon.
How Moonset is used in a reading
Use Moonset with local coordinates, phase, date, and time zone, especially when planning meteor or deep-sky observation.
Where interpretation stops
Moonset is presented as sourced astronomy, calendrical, Earth-science, cultural, or instrument-history reference. Definitions should distinguish measured phenomena from civil convention and historical interpretation, preserve location and time dependencies, and avoid turning factual sky data into a deterministic personal claim.
Sources and editorial method
Research references used for this entry include:
- U.S. Naval Observatory: Rise, Set, and Twilight Definitions - Definitions used by USNO for sunrise, sunset, moonrise, moonset, and twilight.
- U.S. Naval Observatory: Complete Sun and Moon Data - Authoritative astronomical data services for positions, phases, and rise and set events.
The page starts with a direct definition, then separates use, example, caution, spiritual meaning, and historical context. For astrology, occult, demonology, curse, and spiritual warfare terms, the editorial rule is to explain the term without making fear-based, fatalistic, medical, legal, financial, or ritual-instruction claims.
Continue learning
Continue into the live sky, space weather, universal timing, and the wider field surrounding the current season.
Open Worldwide WatchRelated terms
These related entries help place Moonset inside a wider reference cluster instead of leaving it as a standalone keyword.
