Embed Code

Social Share
balance point, celestial midpoint, day-night parity, solar equilibrium, astronomical crossover

When the sun crosses the equator and day and night are each 12 hours long – the equinox happens twice a year.

Edit Wiki Term

Merriam-Webster Online Dictionary
equinox (noun)
1.
either of the two points on the celestial sphere where the celestial equator intersects the ecliptic
2.
either of the two times each year (as about March 21 and September 23) when the sun crosses the equator and day and night are everywhere on earth of approximately equal length
Equinox (Wikipedia)

A solar equinox is a moment in time when the Sun appears directly above the equator, rather than to its north or south. On the day of the equinox, the Sun appears to rise directly east and set directly west. This occurs twice each year, around 20 March and 23 September.

At Earth's poles the Sun appears at the horizon only and all day around equinox, marking the change between the half year long polar night and polar day. The picture shows the South Pole right before March equinox, with the Sun appearing through refraction despite being still below the horizon.

An equinox is equivalently defined as the time when the plane of Earth's equator passes through the geometric center of the Sun's disk. This is also the moment when Earth's rotation axis is directly perpendicular to the Sun-Earth line, tilting neither toward nor away from the Sun. In modern times[when?], since the Moon (and to a lesser extent the planets) causes Earth's orbit to vary slightly from a perfect ellipse, the equinox is officially defined by the Sun's more regular ecliptic longitude rather than by its declination. The instants of the equinoxes are currently defined to be when the apparent geocentric longitude of the Sun is 0° and 180°.

The word is derived from the Latin aequinoctium, from aequus (equal) and nox (night). On the day of an equinox, daytime and nighttime are of approximately equal duration all over the planet. Contrary to popular belief, they are not exactly equal because of the angular size of the Sun, atmospheric refraction, and the rapidly changing duration of the length of day that occurs at most latitudes around the equinoxes. Long before conceiving this equality, equatorial cultures noted the day when the Sun rises due east and sets due west, and indeed this happens on the day closest to the astronomically defined event. As a consequence, according to a properly constructed and aligned sundial, the daytime duration is 12 hours.

In the Northern Hemisphere, the March equinox is called the vernal or spring equinox while the September equinox is called the autumnal or fall equinox. In the Southern Hemisphere, the reverse is true. During the year, equinoxes alternate with solstices. Leap years and other factors cause the dates of both events to vary slightly.

Hemisphere-neutral names are northward equinox for the March equinox, indicating that at that moment the solar declination is crossing the celestial equator in a northward direction, and southward equinox for the September equinox, indicating that at that moment the solar declination is crossing the celestial equator in a southward direction.

Daytime is increasing at the fastest at the vernal equinox and decreasing at the fastest at the autumnal equinox.

UT date and time of
equinoxes and solstices on Earth
eventequinoxsolsticeequinoxsolstice
monthMarchJuneSeptemberDecember
yeardaytimedaytimedaytimedaytime
20202003:502021:432213:312110:03
20212009:372103:322219:212115:59
20222015:332109:142301:042121:48
20232021:252114:582306:502203:28
20242003:072020:512212:442109:20
20252009:012102:422218:202115:03
20262014:462108:252300:062120:50
20272020:252114:112306:022202:43
20282002:172020:022211:452108:20
20292008:012101:482217:372114:14
20302013:512107:312223:272120:09


Equinox (Wiktionary)

English

Etymology

From Middle English equinox, equinoxe, equynox (one of the two periods in the year when the day and night are of equal length, equinox; either the zodiac sign Aries or Libra, in which the sun crosses the celestial equator), from Old French equinoce, equinoxe (modern French équinoxe), or from its etymon Medieval Latin ēquinoxium, ēquinoctium, from Latin aequinoctium (equinox), from aequus (equal) + nox (

... Read More
texto a traducir
Here's
Frequently Asked Questions

We’re About Empowering Our Partners From “All Walks of Life” to Create Cannabis Opportunities That’ll Make Them Excited to Get Out of Bed Every Single Morning & Truly INSPIRE the Cannabis Industry Every Day

1

ChatGTP

ChatGPT integration is also compatible with the Double-click feature. It means that when the user clicks on any word on the page, a tooltip will appear with an automatically generated definition by ChatGPT, even if the term is not defined as a glossary term.

2

Languages

Community “Wiki” terms can have multiple versions (ex. English, Spanish, French, etc.) so you can easily switch between languages & supports UTF-8 to use virtually all characters, even symbols (ex. mathematical operators, music notation, etc.).

3
Standards

Our Wiki follows WCAG 2.0 recommendations & it allows users with disabilities to navigate between terms using the keyboard & by adding ARIA attributes to help screen readers understand the context.

Need some answers?
What is this "Wiki" & how does the cannabis community benefit?

The Green CulturED Wiki enables you to explore, learn, and share through a knowledge base tailored to the cannabis industry. It functions like an encyclopedia, lexicon, glossary, wiki, or dictionary. This tool is useful for industry learners and professionals to learn more about resources, programs, and terms specifically in the cannabis sector.

Yes, new terms can be added by crafting individual entries, each with its own dedicated page and unique URL. By sharing resources, information, and industry information, users are able to foster community, growth, and learning. Once submitted, a glossary term is reviewed by the Green CulturED team, which will then approve or deny the submission. 

While the Green CulturED Community Wiki does not impose specific content restrictions, it is essential to adhere to general web content guidelines, which include avoiding misinformation and respecting copyright laws. For cannabis-related glossaries, it’s critical to ensure the accuracy and legality of the information presented. In addition, common courtesy and “netiquette” are part of our community user agreement, and it is crucial to maintain those levels of respect when adding new terms, comments, etc.

Glossary term categories serve as a reference tool that enhances usability, navigability, and educational value by organizing terms into groups such as industry brands, consulting firms, and seed banks.

The Green CulturED Wiki supports comments on individual glossary terms, enabling users to engage in discussions or leave feedback. This feature fosters collaborative learning and knowledge sharing within the cannabis community.
If you encounter incorrect or outdated information, please contact the site administrators directly or use the commenting feature to report inaccuracies for review and correction. Green CulturED Wiki allows for revisions, enabling updates and corrections.
Green CulturED Wiki utilizes user rights and capabilities for managing and reviewing user-contributed terms. Administrators can set specific permissions and establish review processes according to their policies.
Frequently Asked Questions
"Contribute & Edit/Update Our Community Wiki That Provides An Extensive Knowledgebase Where You'll Find Cannabis Industry Terms & Definitions..."
Do NOT Grow Another Plant Until You've Enrolled Into This! 💯
Cannabis Horticulture
A Carefully Curated Cultivation "Crash Course" On Everything You Need To Crank Out High-Yielding, "Cannabis-Cup Winner" Flowers That'll Generate HUGE Crops All-Year Long
Crafting Cannabis-Infused Edibles Takes MORE Than Ingredients... 🍽️
Edible Cannabis Products (100% FREE Training)
Enthusiasts Face Challenges Navigating An Ever-Expanding Array Of Cannabis Products & Delivery Methods From "Raw Flower" Smoothies To Infused-Edibles, Cannabinoid-Based Drinks + MORE.