equinoxes
Day-night balance points
Equinoxes are the two moments each year when the sun crosses the celestial equator, making day and night approximately equal in length worldwide.
The vernal equinox occurs around March 20, marking the start of spring in the Northern Hemisphere; the autumnal equinox falls around September 22, beginning fall.
The equinoxes signal seasonal transitions.
Relating to spring
- autumnalOf the harvest season
- solsticesAnnual solar standstill events
- celestialOf the sky above
- orbitCurved celestial path
sun · equator · declination · hemisphere · latitude · precession · ecliptic · zodiac
Recoiling metal spiral
- autumnPost-summer cooling period
- daylightSun's natural glow
- nightDark hours daily
- balanceSteadiness or amount owed
transition · seasons · midpoint · cycle · renewal · harvest · lengthening · shortening
Iranian New Year festival
- HoliSpring festival of colors
- festivalsOrganized communal celebrations
- ritualsCeremonial repeated practices
- celebrationsOrganized expressions of joy
pagan · Wiccan · fertility · thanksgiving · ancestor veneration · wheel of the year
vernal
Relating to spring
orbit · sun · equator · declination · hemisphere · latitude · precession · ecliptic · zodiac · axial tilt
spring
Recoiling metal spiral
balance · transition · seasons · midpoint · cycle · renewal · harvest · lengthening · shortening · twilight
Nowruz
Iranian New Year festival
- HoliSpring festival of colors
- festivalsOrganized communal celebrations
- ritualsCeremonial repeated practices
celebrations · pagan · Wiccan · fertility · thanksgiving · ancestor veneration · wheel of the year
- astronomical tablesephemeris, astronomical tables, moon phases, lunar phases, sunset times
- stargazingtelescope, stargazing guides, night sky, stars, constellation
- sky and timesun, moon, stars, planets, comet
- archaeoastronomyStonehenge, stone circles, medicine wheels, ancient observatories, standing stones
- astrologyastrology, zodiac, horoscope, horoscopes, birth chart
- Asian astrologyChinese zodiac, zodiac animals, tiger, rat, goat
equinoxessolstices
Annual solar standstill events
summer solstice · winter solstice · June solstice · December solstice · longest day
- spring equinoxDay and night match
- fall equinoxSeptember equal day-night event
- autumn equinoxEqual day and night
- autumnal equinoxEqual day and night
- vernal equinoxSpring's astronomical beginning
- September equinoxFall's equal day-night moment