Recently, the spring equinox of 2026 occurred in Mexico, and the truth is there is much more behind the March 20 date than most people think. It’s not just a change of season, but something that people have celebrated for centuries, especially in places like Teotihuacan and Chichen Itza. Interestingly, many do not really know what this astronomical event signifies beyond the fact that "spring has arrived."

Basically, the equinox occurs when the Sun reaches a position where its rays are perpendicular to the Earth's equator. This means that on that day, night and day are exactly the same length worldwide, 12 hours each. The scientific significance is interesting: from that moment, days begin to get longer and nights shorter in the Northern Hemisphere. According to UNAM, this directly affects things like vitamin D production and even fertility because our bodies are very sensitive to the amount of sunlight.

In Mexico, the spring equinox took place exactly on March 20 at 08:46 AM, Central Time. It was especially important for the agricultural sector because it marks the start of a season when crops like wheat, oranges, and watermelons reach high production levels. Spring rains also play a crucial role, keeping the soil moist for plant development.

Now, the cultural significance is what truly attracts so many people. The word equinox literally means "equal night," and there is a popular belief that this balance between light and darkness is the perfect moment for people to balance their own energies. That’s why thousands of visitors gather at pre-Hispanic archaeological sites. Although scientifically it has been proven that solar energy during the equinoxes is the same as any other day of the year, the practice persists and has undeniable cultural value.

The Mexican government implemented a security operation from March 20 to 22 at these archaeological sites to protect both visitors and the heritage. Teotihuacan and Chichen Itza had special hours on those days. Interestingly, people rarely celebrate the autumn equinox with the same intensity, even though astronomically it holds exactly the same importance.