August 13, 2021
In 1960 on this date, the U.S. Geological Survey announced the completion of the first known photogeological survey of the lunar surface. You can read about and download a digital version of the latest the Unified Geologic Map of the Moon here.
View of the Moon on August 17, 2021, and the corresponding geologic map. Image Credit: NASA, SVS, Ernie Wright; Map Credit: USGS