When do the 4 seasons start and end?

The four seasons start and end when

• the earth is facing towards the sun
• away from the sun
• half way near the sun

Spring starts on the 21st of March and ends on the 21st of June.

Winter starts on the 23rd of December and ends on the 21st of February.

Summer starts on June 21st and ends on September 23 rd.

Fall /autumn starts on September 23rd and it ends on 23rd of December.

This passage or cheap piece of writing was written by the all Famous Eihab Alnajjar.

WHAT HAPPENS BETWEEN 21ST FEBRUARY AND 21ST MARCH WINTER LITE?