Astronomical spring begins at 17.33 pm on March 20. This day marks the spring equinox, the National Institute of Meteorology and Hydrology announced. Days are getting longer and nights are getting shorter. In the Northern Hemisphere the vernal..
At 12.29 hours Bulgarian time today the astronomical spring in the Northern Hemisphere starts. March 20th this year is the day of the vernal equinox, when the length of day is equal to that of the night. The date of the vernal equinox varies each year..
