When exactly is the spring equinox?

Related questions

1. What is a super worm moon?
2. What happens during an equinox?
3. What does the Equinox signify?
4. During what month is there 24 hours of daylight below the Antarctic Circle?
5. Why is it called the worm moon?
6. What is today's equinox?
7. Is it always a full moon on the equinox?
8. What does equinox mean in science?
9. What does the equinox mean spiritually?
10. What's the name of tonight's moon?

Tags

1. #northern
2. #astronomical
3. #marks
4. #balance
5. #called
6. #hemisphere
7. #falls
8. #event
9. #first
10. #spring
11. #equinox
12. #vernal
13. #wednesday
14. #march
15. #before