This story was updated to add new information. Spring has sprung, bringing warmer days and blooming flowers. Thursday is the first day of spring, or the vernal equinox, in the Northern Hemisphere.

The Northern Hemisphere’s vernal (spring) equinox can fall between March 19 and 21 while the fall equinox hits sometime between September 21 and 24.

The vernal equinox signals the astronomical start of spring in the Northern Hemisphere, with the sun crossing above Earth's equator, moving from south to north, at 5:01 a.m. EST (0901 GMT) on ...

The Northern Hemisphere’s spring — or vernal — equinox can land between March 19 and 21, depending on the year. Its fall – or autumnal — equinox can land between Sept. 21 and 24. Why are ...

The Northern Hemisphere’s spring — or vernal — equinox can land between March 19 and 21, depending on the year. Its fall – or autumnal — equinox can land between Sept. 21 and 24.

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

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

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

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

The vernal equinox signals the astronomical start of spring in the Northern Hemisphere, with the sun crossing above Earth's equator, moving from south to north, at 5:01 a.m. EST (0901 GMT) on ...

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