Dictionary term
Sidereal Month
Direct answer
Sidereal Month: A Sidereal Month is the time the Moon takes to return to the same direction relative to the stars.
A Sidereal Month measures the Moon orbit against a stellar reference.
- Source
- The Great Almanac Dictionary
- Category
- Calendars & Timekeeping
- Also appears in
- Calendars & Timekeeping
- Aliases
- None listed
- Last updated
- 2026-07-16
Quick reference
- Use when
- Use Sidereal Month in lunar position calculations and comparisons among lunar periods.
- Do not use it for
- Do not use the sidereal month to predict the next identical lunar phase.
- Reference category
- Calendars & Timekeeping
- Related terms
- Synodic Month, Anomalistic Month, Calendar, Julian Date
The story behind Sidereal Month
Star-based observation provided a stable way to recognize the Moon orbital return independently of phase.
Sidereal Month in spiritual tradition
Spiritually, the sidereal month shows how one motion can produce different cycles against different backgrounds.
The Great Almanac frames Sidereal Month 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.
Sidereal Month in the Bible
This is a factual calendar, astronomy, Earth-science, cultural-history, or observational reference. It can support wonder and practical planning without becoming a claim of fate, spiritual causation, or private revelation.
Sidereal Month in numerology
Sidereal Month 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 Sidereal Month matters
It distinguishes the Moon orbital revolution from its longer phase cycle, during which Earth also moves around the Sun.
Example in a reading: The mean sidereal month is about 27.32 days, roughly two days shorter than a synodic month.
Interpretive caution: Do not use the sidereal month to predict the next identical lunar phase.
How Sidereal Month is used in a reading
Use Sidereal Month in lunar position calculations and comparisons among lunar periods.
Where interpretation stops
Sidereal Month 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: Astronomical Almanac Glossary - Reference definitions for astronomical periods, coordinates, dates, and time scales.
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
Place this timekeeping idea beside the current sky, universal timing, and live celestial positions.
Open Worldwide WatchRelated terms
These related entries help place Sidereal Month inside a wider reference cluster instead of leaving it as a standalone keyword.
