2017年3月20日 · In the northern hemisphere, the spring, or vernal equinox happens around March 21, when the sun moves north across the celestial equator. The autumnal equinox occurs around September 22nd, when the sun crosses the celestial equator going south.

The first day of spring 2025 is on Thursday, March 20, 2025, at 5:01 a.m. EDT (2:01 a.m. Pacific). For those of us in the Northern Hemisphere, this is marked by the arrival of the spring equinox (otherwise known as the “First Point of Aries”).

2025年1月15日 · What Is the Spring Equinox? In the Northern Hemisphere, the spring equinox (also called the March equinox or vernal equinox across the globe) occurs when the Sun crosses the celestial equator going south to north. It’s called the “celestial” equator because it’s an imaginary line in the sky above Earth’s equator.

21 小时之前 · The March equinox — also referred to as the spring equinox — is an astrological occurrence that marks the seasonal shift. "During the March equinox, the Earth is perpendicular to the sun, with ...

2017年3月15日 · The spring equinox brings nearly equal amounts of daylight and darkness. Falling in March, it marks the start of spring in the Northern Hemisphere.

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.

The vernal equinox, marking the beginning of spring in the Northern Hemisphere, occurs about March 21, when the Sun moves north across the celestial equator. The autumnal equinox falls about September 23, as the Sun crosses the celestial equator going south.

2024年3月19日 · The vernal equinox arrives on Tuesday, marking the start of the spring season for the Northern Hemisphere. But what does that actually mean? Here’s what to know about how we split up the year using the Earth’s orbit.

2024年9月4日 · The equinox marks a seasonal change, signaling the beginning of spring or autumn. Key Points Definition and Occurrence: An equinox occurs twice a year, around March 20 and September 23, when the Earth’s equator passes directly under the Sun.

2024年12月11日 · According to the astronomical definition of the seasons, the vernal equinox also marks the beginning of spring, which lasts until the summer solstice (June 20 or 21 in the Northern Hemisphere, December 21 or 22 in the Southern Hemisphere).