March 20, 5:01 AM, Marked The Spring Equinox in Hainan Island
The Spring Equinox is the moment when the sun crosses the celestial equator, bringing nearly equal hours of daylight and darkness across the world. In 2025, this event happened on March 20 at 5:01 AM local time in Hainan, marking the shift to spring in the Northern Hemisphere and autumn in the Southern Hemisphere.
From a scientific perspective, the equinox is when the Earth’s axial tilt is neutral relative to the sun, meaning neither hemisphere is tilted toward or away. This minimizes seasonal differences, though due to atmospheric refraction, true day and night aren’t exactly equal.
The Spring Equinox in Chinese History
In China, this time of year is known as Chunfen (春分) and is one of the 24 solar terms in the traditional lunisolar calendar. These solar terms, first developed during the Warring States Period (475–221 BCE) and refined in the Han Dynasty (206 BCE–220 CE), were essential for farming. Chunfen was a key indicator that temperatures were rising and it was time to start planting, especially in northern China.
Astronomy and Philosophy in Ancient China
Chinese astronomers carefully tracked the movements of the sun, moon, and stars to create accurate calendars. The equinoxes and solstices weren’t just agricultural markers, they also shaped governance, rituals, and even the architecture of imperial observatories. Chunfen was deeply tied to the concept of yin and yang, symbolizing balance and harmony in nature.
Global Traditions Celebrating the Spring Equinox
Many cultures have long celebrated the equinox with their own customs:
- Persia: The Nowruz festival, dating back over 3,000 years, marks the Persian New Year. Families gather for festive meals, set up the symbolic Haft-Seen table, and welcome the renewal of spring.
- Europe: Druids and pagans held ceremonies at sacred sites like Stonehenge, aligning rituals with the sun’s movement.
- Mesoamerica: The Mayan pyramid of Kukulkán at Chichén Itzá in Mexico was designed so that during the equinox, sunlight creates a serpent-like shadow slithering down its steps.
- Japan: The national holiday Shunbun no Hi encourages people to appreciate nature’s renewal and visit ancestral graves.
Traditional Chinese Practices During Chunfen
While Chunfen was historically an agricultural marker, it also became associated with unique traditions:
Egg Balancing Tradition
A well-known but more modern practice involves balancing eggs on their ends, said to be easier on the equinox due to the Earth’s gravitational alignment. Though this isn’t scientifically true, the custom reflects the idea of harmony and stability.
Seasonal Foods and Herbal Remedies
In parts of China, Chunfen is a time to eat fresh spring vegetables and prepare herbal remedies, believed to boost health and align with the season’s energy.
Ceremonial Offerings
During imperial times, rulers held ceremonies to honor the sun and earth, reinforcing the belief that a balanced universe brought prosperity. These rituals took place at sacred altars and were seen as essential to maintaining cosmic harmony.
With modern advancements, agriculture no longer depends on the solar terms the way it once did, but Chunfen remains a meaningful part of Chinese culture.
It’s a reminder of the rhythms of nature, the wisdom of ancient traditions, and the ways people throughout history have marked the passage of time.
Related article: Everything you wanted to know about the Chinese calendar but were too confused to ask
