All students and teachers can create an eXmas card and post it in the Twinboard.
They can post a Xmas card as an image or a link to an on-line eXmas card
A folder named "eXmas cards" is created in materials>images to archieve them
The Dōngzhì Festival or Winter Solstice Festival 
One of the most important Chinese and East Asian festivals.
The origins of this festival can be traced back to the yin and yang philosophy of balance and harmony in the cosmos. After this celebration, there will be days with longer daylight hours and therefore an increase in positive energy flowing in.