So March would be early spring, April mid spring and May late spring.

What's considered late spring?

Spring late March June. However, many consider summer to be May and fall to August, as summer holidays usually start in late May and end in early August. Spring is therefore March May (technically March 21 to June 21).

What date is considered early spring?

First Day Of Spring 2020 Comes Early Spring begins at 11:50 p.m. ET on March 19 this year. It is the earliest nationwide vernal equinox since 1896.