Midwinter - the shortest day of the year, and exactly opposite Litha in the wheel of the year. Yule, the Winter Solstice, occurs around 21st December - although the date varies from year to year depending on when the actual solstice occurs astronomically, so it's more accurate to say that it falls between 20th-23rd December.
The Earth lies cold and still, subdued by the harsh winter. Animals and insects are in hibernation, awaiting the return of the light and warmth - and often we feel like doing the same.
We mustn't forget that as cold and cruel as these winter months seem, they are necessary. The chill of winter is a part of the cycle of the seasons, and is necessary to allow nature to recoup the energy expended in the warm months. Without this break, plants would run riot and nature would overstretch itself; the cold performs a necessary cull and helps to control both the spread of plants and the survival of animals - survival of the fittest.
Yule marks Midwinter - the shortest day and the longest night. After this point, the days start to lengthen again and we begin to look forward to Spring.

