When does winter start?

Winter begins on the winter solstice, the shortest day of the year, when a hemisphere is tilted farthest from the Sun. In the Northern Hemisphere this occurs around December 21–22, while the Southern Hemisphere's winter solstice falls around June 20–21. Despite having the least daylight, the coldest temperatures usually arrive weeks later because oceans and land masses take time to release stored heat.

The winter solstice has deep cultural significance across many civilizations. Celebrations such as Yule, Dongzhi, and Saturnalia all mark this turning point when days begin to lengthen again. Astronomically, winter lasts from the solstice to the following vernal equinox.

Tool description

This tool displays a live countdown to the next winter solstice. It updates every second, showing the remaining days, hours, minutes, and seconds. You can switch between Northern and Southern Hemisphere dates, and a progress bar indicates how much of the waiting period has already passed.

Features

  • Real-time countdown ticking every second until the winter solstice
  • Hemisphere selector for Northern (December 21) and Southern (June 20) dates
  • Progress bar tracking the percentage of time elapsed toward winter
  • Automatic notification when winter is currently active
  • Target date rendered in your local date format

Use cases

  • Tracking the approach of the holiday season and winter festivities
  • Planning ski trips, winter sports, or cold-weather travel around the solstice
  • Educational tool for comparing when winter starts in different hemispheres