expression, noun
Vernal Equinox Day; Spring Equinox Day
A Japanese national holiday occurring around March 20 or 21, marking the astronomical beginning of spring.
春分の日は昼と夜の長さがほぼ同じになる日です。
Vernal Equinox Day is the day when day and night are nearly equal in length.
今年の春分の日
This year's Vernal Equinox Day is March 21st.