December 1 is World AIDS Day and Rosa Parks Day.

December 2 is a Palindrome Day, if you write your dates in ISO Standard (2021/12/02), or U.S. standard (12/02/2021).

December 6 is The National Day of Remembrance and Action on Violence Against Women. It has been over 30 years since the murder of 14 young women at Polytechnique Montréal (December 6, 1989).

December 10 is Human Rights Day. Seventy-three years ago, in 1948, the United Nations General Assembly issued the Universal Declaration of Human Rights (UDHR). Some progress has been made, but there is still a long way to go.

The December Solstice (winter solstice in the Northern Hemisphere) marks the time when  Earth has its maximum tilt away from the sun, this year on December 21 at 15:59 UTC.  For those who prefer light, it’s a time to celebrate that the days are getting longer. But while it’s still dark, we can enjoy some interesting astronomical observations in the cold, clear, long nights of December, such as the alignment of planets and the Geminid meteor shower.

December 31 marks the end of 2021, and CFIC extends our wishes to all the readers of Critical Links for a happy, healthy, and rational 2022.

If you celebrate any of these, or have suggestions for upcoming celebrations or observances, please drop us a line or send a picture to