CIVIL WAR TRAVELER.COM - This is the main site (CLICK HERE). This looks like an online "magazine" with information for all over the country. It does include Missouri.
This appears to be the December newsletter.
Click (Civil War Traveler.com)
This site has many activities happening around the country in the month of December.
To many to list here, but these are some of the highlights.
Battlefield Illuminations planned
Interactive Chattanooga tour from CWT
Lincoln home features Christmas decor