CST vs CET — cities and working rhythm
US Central — Chicago-anchored, most of the middle third of the US, plus much of Canada's prairies and central Mexico. Business hours 9 AM – 5 PM CT. Note: CST is also used for China Standard Time (UTC+8) — completely different zone. This converter treats CST as US Central unless the target zone makes China context obvious.
Most of continental Europe — DACH, Benelux, France, Iberia, Nordics (except Finland), Poland, Czech Republic. Business hours 9 AM – 5:30 PM CET, with a longer lunch (12:30 – 2 PM) in southern countries. Winter: CET (UTC+1); summer: CEST (UTC+2). Big lag against North America — early morning CET overlaps late night ET.
Time gap: CET is 7.0 hours ahead of CST (standard-time offsets — daylight-saving flips shift this by an hour twice a year in most northern-hemisphere zones).