10/13/2026
The US time zones were settled on this corner in Chicago.
Before 1883, there were more than 100 different local times across the country; railroads were trying to run schedules through all of them. So their managers met at the Grand Pacific Hotel, stood where the Central Standard Building stands today at Jackson and LaSalle.
On October 11, 1883, they adopted a plan to divide the country into four time zones, each one hour apart. It took effect on Sunday, November 18, 1883, known as the Day of Two Noons.
The 1924 building that replaced the hotel took its name from that moment, and a small plaque on Jackson Street still marks it. I found the lobby empty early on a Sunday morning, a long row of columns running toward a clock in the distance, and shot it in black and white.
Did you know time zones started in Chicago?
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