The events are set in winter-like setting, with most of the plants covered in snow, rivers and lakes (and possibly seas) frozen except at rapids, minimal animal activity, etc.
Alternate names: Snow setting, Ice setting
Note that "winter" itself is variable in what it does across the world, but this tag is not as malleable. In southern countries "winter" consists mostly actually worst portions of autumn/spring weather rather than any real winter (such as barely even gaining frost). This tag is only for "proper" winters with snow and things freezing solid.
Seasonal themes: Vernal
See also: seasons