Winter

Winter is one of the four seasons of temperate zones. Astronomically, it begins with the winter solstice (around December 21 in the Northern hemisphere and June 21 in the Southern hemisphere), and ends with the spring equinox (around March 21 in the Northern hemisphere and September 23 in the Southern hemisphere). In meteorology, it is by convention counted instead as the whole months of June, July and August in the Southern hemisphere and December, January and February in the Northern hemisphere.

References

• Rosenthal, Norman E. (1998). Winter Blues. New York: The Guilford Press. ISBN 1572303956