On February 9, 1942, the US officially set its clocks ahead one hour to war time for the duration of the war, and so John H. Cooper, pictured here, changed the clock at the Weber & Judd Masonic Building.
A similar step had been taken during World War I, but only lasted between the months of March and October.
According to the Rochester Post Bulletin, the reason for the change was to “contribute to the nation’s available electric power supply by leveling off some of the demand peaks.”
Now an annual occurrence in most of the US, the paper reported few issues with this instance of daylight saving, other than a little sleepiness and overnight trains arriving an hour later than scheduled.
This photo comes from the extensive archive collection at the History Center of Olmsted County.