When Is Winter 2024 In Usa Calendar. 2024 calendar of holidays and celebrations in the united states. In 2024, the first day of winter is saturday, december 21.
— here’s a list of the exact dates and times of the four seasons in north america, including the first days of winter, spring, summer, and fall for the next few. In the table below, you will find the details of the holidays and when they are observed.