The winter solstice, on December 21, marks the beginning of astronomical winter, with the fewest hours of daylight. In Bucharest, the day will have 8 hours and 50 minutes of daylight.

The winter solstice, which occurs on December 21, signifies the beginning of astronomical winter in the northern hemisphere, having the shortest day of the year, with 8 hours and 50 minutes of natural light. This phenomenon is the result of the Earth's movement around the Sun and the tilt of its axis, which determines seasonal variations. At the winter solstice, the Sun is at its lowest position in the sky, and the North Pole is tilted away from the Sun, thus generating the longest nights.