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Typically there are considered to be four seasons per year which may be determined astronomically, by calendar month, or by lunar month. They are Spring, Summer, Winter & Fall. Many ecologists use a six season model that have no fixed dates: Prevernal (early or pre-spring), Vernal (spring), Estival (high summer), Serotinal (late summer), Autumnal (fall), and Hibernal (winter). Source Wikipedia
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11y ago

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