Winter Solstice Day 2025 Usa. Winter solstice — is the day of the year when the sun passes through the southernmost point of the ecliptic in the northern hemisphere (or through the northernmost point in the southern hemisphere). Winter solstice — is the day of the year when the sun passes through the southernmost point of the ecliptic in the northern hemisphere (or through the northernmost point in the southern.
Winter ends on thursday, march 20, 2025, once the vernal equinox (spring equinox) begins. United states 2025 holiday calendar with all major holidays and observances.