Linked from

The 29 pages that link to Equinox, each with the reason it gives.

• Gregorian calendarRelated: The reform aimed to keep the calendar’s date of Easter’s spring reference near the March equinox.

• HipparchusRelated: The shifting equinoxes supplied the reference for his discovery of precession.

• Axial tiltRelated: Equinoxes mark points in the orbit when tilt produces neither hemisphere's maximum seasonal exposure.

• EquatorRelated: At an equinox, the Sun is directly overhead at the Equator at noon.

• Celestial equatorRelated: The crossings mark the seasonal points where the Sun changes celestial hemisphere.

• Calendar reformRelated: The Gregorian reform used the spring equinox as a seasonal reference for Easter calculation.

• Ecliptic coordinate systemRelated: The vernal equinox commonly defines zero ecliptic longitude.

• Aleister CrowleyRelated: Crowley used the journal to document and disseminate his magical system.

• GnomonRelated: At an equinox, a vertical gnomon’s noon shadow aligns with the east–west direction.

• Sidereal yearRelated: Equinox-based timing defines the tropical year, a useful comparison for sidereal timing.

• TropicsRelated: At the equinoxes, the subsolar point crosses the equator within the tropics.

• Solar calendarRelated: Equinoxes provide astronomical markers for solar calendars and year definitions.

• ZodiacRelated: The March equinox anchors the starting point of the tropical zodiac.

• AutumnRelated: The autumnal equinox marks autumn’s astronomical beginning in each hemisphere.

• Spring (season)Related: The March and September equinoxes mark seasonal transitions in each hemisphere.

• Astronomical coordinate systemsRelated: Equatorial coordinates use an equinox to set the zero point of right ascension.

• East (direction)Related: Near an equinox, the Sun rises close to due east at most inhabited latitudes.

• Year (calendar)Related: The vernal equinox provides a seasonal reference for the tropical year.