Seasons: By Calendar __full__

Simpler for climate records: split calendar into 3-month blocks based on temperature cycles.

Six seasons ( Ritu ), each two months long. seasons by calendar

Severe asthma exacerbation was defined as a deterioration of asthma leading to treatment for 3 days or more with systemic glucocor... ScienceDirect.com Seasons - North Carolina State Climate Office Climatologists usually use full months to represent the seasons. Winter is considered December, January and February; spring is Ma... North Carolina State Climate Office Show all Spring Equinox (approx. March 20/21): Days begin to get longer than nights. Summer Solstice (approx. June 20/21): The longest day of the year; days begin to shorten after this point. Autumn Equinox (approx. September 21/22): Days become shorter than nights. Winter Solstice (approx. December 21/22): The shortest day of the year; days begin to lengthen after this. 3. Regional Variations Different parts of the world use varying calendar structures based on local climate: Southern Hemisphere Simpler for climate records: split calendar into 3-month

| Season | Calendar Start | Key Event | Day Length Phenomenon | | :--- | :--- | :--- | :--- | | | ~March 20 | Vernal Equinox | Day and Night nearly equal | | Summer | ~June 21 | Summer Solstice | Longest day of the year | | Autumn | ~Sept 22 | Autumnal Equinox | Day and Night nearly equal | | Winter | ~Dec 21 | Winter Solstice | Shortest day of the year | ScienceDirect