The first day of astronomical spring – or the vernal equinox – begins on March 20. The vernal equinox means day and night last about the same amount of time. Meteorological spring began on March 1.

Spring is almost here — officially, at least. The vernal equinox arrives on Thursday, marking the start of the spring season for the Northern Hemisphere and the fall in the Southern Hemisphere. On the ...

The National Oceanic and Atmospheric Administration's GOES East satellite captured a view of Earth during vernal equinox in 2020. Despite the recent resurgence of winter weather, I can feel how close ...

An Iranian man jumps over a firework celebrating Chaharshanbe Souri, or Wednesday Feast, an ancient Festival of Fire on the eve of the last Wednesday of the Persian year, in Tehran, Iran, Tuesday.

Meteorological spring starts on March 1 and is based on annual temperature cycles, while astronomical spring starts on March 20 and is based on the Earth's position relative to the sun. The vernal ...