Daily Holidays - December 19 [View all]
Oatmeal Muffin Day 
While muffins have been a staple for quite a few centuries, starting with English style muffins which are yeast raised and cooked on a griddle, and have been dated back to the 10th or 11th century in Wales. American style muffins are known as quick bread muffins, which are made in individual molds. Quick bread muffins were not developed until close to the end of the 18th century, where pearlash, a refined form of potash, was discovered.
https://www.daysoftheyear.com/days/oatmeal-muffin-day/
Look for An Evergreen Day 
was originally established by the National Arborist Association to create a day to appreciate the beauty of these trees outside of the confines of merely being bedecked with glittering lights and ornaments· Even in the depths of winter these noble trees keep their foliage, providing that wonderful green and white contrast that is so representative of deep winter.
https://www.daysoftheyear.com/days/look-for-an-evergreen-day/
http://www.famousbirthdays.com/december19.html