New York is exactly 1 hour ahead of Chicago year-round. When it's 3:00 PM in New York, it's 2:00 PM in Chicago. Both cities observe daylight saving time on the same schedule.
New York is in the Eastern Time Zone (ET) while Chicago is in the Central Time Zone (CT). This 1-hour difference is consistent throughout the year since both cities change clocks together.
Any business hours work well! With only a 1-hour difference, 9:00 AM - 5:00 PM New York corresponds to 8:00 AM - 4:00 PM Chicago. Full business day overlap.
New York and Chicago are America's two largest financial centers, with constant coordination between Wall Street and the Chicago Mercantile Exchange.