Last Day Of Winter 2025. Last day to add or swap winter 2025 undergraduate classes (other than engineering classes or architectural science collaborative exercise classes offered in ers sessions). Winter solstice 2025 (beginning of astronomical winter) on the day of the winter (december) solstice, the sun passes through the southernmost point of the ecliptic, that is, as far as.

Add period begins (open enrolment) Find out the date when winter is in 2025 and count down the days until winter with a countdown timer.