Answer: Vernal equinox(about March 21): day and night of equal length, marking the start of spring. Summer solstice (June 20 or 21): longest day of the year, marking the start of summer.
The first day of spring (March 20) means the first day of the growing season. it also has some cold temperatures, rain and sun. The first day of summer (June 20 or 21) means the first day of school break. summer has sun, which you will need to wear summer clothes.
