1st - start of Meteorological Winter
4th - Wildlife Conservation Day
4th - International Cheetah Day
4th - Full 'Cold' Moon (Supermoon)
5th - World Soil Day
11th - International Mountain Day
21st - Winter solstice - start of Astronomical winter
21st - Songbird Survival's 'National Robin Day'
24th - Christmas Eve
25th - Christmas Day
31st - New Year's Eve