Be ready to move your clocks ahead Sunday, March 10 as Daylight Savings Time begins.
In layman’s terms this is called “Spring Ahead”, but the Vernal (Spring) Equinox is not until March 20.
Not entirely equal day and night
The spring equinox (also called the March equinox or vernal equinox) falls on Wednesday, March 20, 2019, at 5:58 P.M. EDT. This event marks the astronomical first day of spring in the Northern Hemisphere.
On the equinoxes, the sun shines directly on the equator and the length of day and night is nearly equal – but not quite.
The March equinox marks the moment the sun crosses the celestial equator – the imaginary line in the sky above the Earth’s equator – from south to north
Astronomically speaking, the first day of spring is marked by the spring equinox, which falls on March 19, 20, or 21 every year. The equinox happens at the same moment worldwide, though our clock times reflect a different time zone. And, as mentioned above, this date only signals spring’s beginning in the Northern Hemisphere; it announces fall’s arrival in the Southern Hemisphere.
A full moon on the equinox
For the first time in nearly 40 years, the spring equinox will occur on the same day as March’s Full Worm Moon. The last time that these two events landed on the same date was on March 20, 1981, though they did come close again in March 2000, separated by a span of only four hours.
But that’s not all: March’s full Moon will also be a supermoon, meaning that it will be slightly larger and brighter than most of the other full Moons this year.