Seasons and sky
March Equinox
Direct answer
March Equinox: The March Equinox is the instant the Sun's apparent geocentric center crosses the celestial equator northward.
$0 today, then $12/month after 7 days. Cancel anytime.
At a glance
- Found in
- Seasons & Earth Almanac
- Related
- September Equinox, Astronomical Season, Equinox, Solstice
The March Equinox is the Sun's northward crossing of the celestial equator.
A Sun-Earth orientation for seasonal, atmospheric, tidal, and terrestrial terms.
What does your own chart say about you?
Choose love, work or purpose. Your reading is written from your chart. Your reading uses your own birth details.
Walk through Alex’s whole example first
The Road of AgesSee the turning points of your whole life, from your birth date
See your road's shape
Prefer to explore first?
The Road of AgesThe turning points of your whole life, from your own chart
Walk my road
Free, by email
Your daily Almanac letter
One short letter at 7 each morning: the day’s theme read for your own chart, and one thing to do with it.
The story behind March Equinox
Equinox observations anchored calendars for millennia, while modern ephemerides calculate the crossing from precise solar coordinates.
Why March Equinox matters
March Equinox marks the astronomical start of Northern Hemisphere spring and Southern Hemisphere autumn while providing a precise global instant.
How to read March Equinox
March Equinox speaks to seasonal boundaries, equatorial solar geometry, and year-to-year almanac tables.
March Equinox in practice: an example
At the March Equinox the subsolar point crosses the equator from south to north.
Where readings of March Equinox go wrong
A common error is to expect exactly twelve hours of daylight everywhere; refraction, the solar disk, latitude, and terrain alter observed day length.
Sources and editorial method
Research references used for this entry include:
- NASA Science: Seeing Equinoxes and Solstices from Space - NASA explanation of axial tilt, the terminator, seasonal illumination, equinoxes, and solstices.
- U.S. Naval Observatory: Length of Day and Night at the Equinoxes - Official explanation of equinox geometry, refraction, and the difference between equinox and equilux.
- Source
- The Great Almanac Dictionary
- Category
- Seasons & Earth Almanac
- Last updated
- 2026-09-26
See the next northward crossing
A definition tells you what it is; your own birth chart tells you what it means for you. The Oracle casts your real chart and answers for your love, your work, and your year ahead, in conversation. It opens with the 7-day Seeker trial.
Speak with the OracleRelated terms
More in Seasons & Earth Almanac
- Nautical Twilight
- Season Length Asymmetry
- Tidal Datum
- Astronomical Dusk
- Civil Dusk
- Diurnal Tide
- Glory
From the reference page to your own chart
Every word here
is in your own chart.
- A personal reading about love, work or purpose, written from your chart
- A practical next step to consider
- It opens with 7 days free, with the AI Oracle and daily guidance
$0 today, then $12/month after 7 days. Cancel anytime.
Common questions
What is the March Equinox?
The March Equinox is the instant the Sun's apparent geocentric center crosses the celestial equator northward.
What do people get wrong about the March Equinox?
A common error is to expect exactly twelve hours of daylight everywhere; refraction, the solar disk, latitude, and terrain alter observed day length.
Free, by email
The Almanac, in your inbox at 7
One short letter at 7 each morning: the day’s theme read for your own chart, and one thing to do with it.
