The sun starts setting later in the day after the winter solstice.

Here's why:

* Earth's Tilt: The Earth is tilted on its axis. This tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year.

* Winter Solstice: The winter solstice marks the shortest day and longest night of the year. In the Northern Hemisphere, this occurs around December 21st. After this point, the days start getting longer.

* Summer Solstice: The summer solstice marks the longest day and shortest night of the year (around June 21st in the Northern Hemisphere). After this point, the days start getting shorter.

So, after the winter solstice, the days start getting longer, meaning the sun sets later.