1. On December 16, 1869, the Wyoming territorial legislature met for the first time in Cheyenne. This was significant because it marked the official beginning of the government of the Wyoming Territory, which was created the year prior.

2. In 1924, on December 16th, the Sheridan Inn in Sheridan, Wyoming was purchased by Buffalo Bill Cody. The inn, which had been constructed in 1892, was a popular spot for travelers and guests of the nearby national parks.

3. On December 16, 1930, a massive blizzard hit southeastern Wyoming, causing widespread damage and numerous deaths. The storm, which came to be known as the "Big Snow," brought heavy snowfall and strong winds, leaving many communities without power or transportation.

4. In 1974, on December 16th, the first "grandstand explosion" took place in Rock Springs, Wyoming. This was a popular winter event in which a dynamite charge was set off under a grandstand, causing it to collapse. The tradition lasted until 1985 when safety concerns led to its discontinuation.

5. On December 16, 2016, Wyoming Governor Matt Mead officially signed a bill legalizing ride-sharing services like Uber and Lyft in the state. This was significant because Wyoming had previously been one of only seven states in the U.S. without laws allowing such services to operate.