It was on this date in 1923 that U.S. President Calvin Coolidge became the first to deliver a presidential address on radio. And it was on this date in 1947 that the Everglades Nation Park in Florida was dedicated.
Mark's Almanac for December 6, 2021
![A photograph of U.S. President Calvin Coolidge.](https://npr.brightspotcdn.com/dims4/default/a45af54/2147483647/strip/true/crop/1024x823+0+0/resize/880x707!/quality/90/?url=http%3A%2F%2Fnpr-brightspot.s3.amazonaws.com%2Fe3%2Fe7%2F61f35e9b4985847e6bab82912d01%2Fservice-pnp-npcc-01900-01930v.jpg)
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