In this category you will find motifs with the primary seasonality of winter, which is both a long period (approximately three months) and varies in its start and duration throughout the world.
Winter is defined astronomically by the period between the Winter solstice and the vernal equinox. In the Northern hemisphere summer falls roughly from December 23rd through March 19th and in the Southern hemisphere from June 21st through September 20th.
The traditional Japanese lunisolar calendar defines winter as as the tenth through twelfth months (originally roughly corresponding to November 8th through February 4th). The integration of the lunisolar calendar with the Gregorian calendar has caused the months to shift "backwards" to correspond with October through December.