By Calendar - Seasons

Many Indigenous calendars define seasons by ecological events (not fixed dates):

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 seasons by calendar

(Note: For the Southern Hemisphere, the seasons and dates are swapped; June is the start of Winter, and December is the start of Summer.) North Carolina State Climate Office Show all Spring

While scientists use meteorological seasons for statistical consistency, society and culture generally adhere to the astronomical calendar for seasonal milestones (e.g., celebrating the "First Day of Summer" on the solstice). June 20/21): The longest day of the year;

As the days grow shorter and the nights grow cooler, autumn brings a sense of coziness and harvest. The air is filled with the smell of ripe pumpkins, woodsmoke, and the sound of leaves crunching underfoot. It's a time for reflection, gratitude, and preparing for the winter months ahead.

| Ritu | Gregorian Months (Northern India) | Season | |------|------------------------------------|--------| | Vasanta | March–April | Spring | | Grishma | May–June | Summer | | Varsha | July–August | Monsoon | | Sharada | September–October | Autumn | | Hemanta | November–December | Pre-winter | | Shishira | January–February | Winter |