When Does Winter 2025 Start. Cdc expects the fall and winter respiratory disease season will likely have a similar or lower number of combined peak hospitalizations due to. 21, 2024, in the northern hemisphere until thursday, march 20, 2025, when the vernal equinox will mark the beginning of spring.


When Does Winter 2025 Start

Winter starts at the moment when the sun is farthest south: Ending on 28 (or 29 during a leap year) february.

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