Convert CST (Central Standard Time) to CEST (Central European Summer Time)

Which CST is this?

CST names more than one zone. This page reads it as Central Standard Time at UTC−6, which is the reading most converters take. There are others: China Standard Time at UTC+8, used in all of mainland China, all year; Cuba Standard Time at UTC−5, used in Cuba in winter.

The letters on a meeting invitation do not say which one is meant. If yours is not Central Standard Time, the answer above is wrong, and not by a little:

Any converter has to pick one of these readings before it can answer, and two of them can pick differently — a page of search results for a CST conversion can show you both answers with neither being wrong. The one to trust is whichever states the zone it means rather than only the letters. Where it matters, ask which country the sender is in.

Best time to schedule a meeting

Standard 9–5 working hours do not overlap at all between CST and CEST. Someone has to take an early or late call — or use asynchronous communication instead.

CST to CEST conversion table

About CST

Central Standard Time (CST) is UTC−6. It is used in Chicago, Dallas, Houston and Mexico City in winter.

CST is the most overloaded abbreviation in timekeeping. It means US Central Standard Time at UTC−6, China Standard Time at UTC+8, and Cuba Standard Time at UTC−5 — a fourteen-hour spread between the first two. This page uses the North American meaning. If an abbreviation reached you without a country attached, that is a reason to ask rather than to assume, and it is the strongest single argument for storing an IANA zone name such as America/Chicago instead.

About CEST

Central European Summer Time (CEST) is UTC+2. It is used in Paris, Berlin, Madrid and Rome from late March to late October.

Central European Summer Time is UTC+2, in force from the last Sunday in March to the last Sunday in October. The European changeover happens at 01:00 UTC everywhere simultaneously, unlike the US which changes at 2am local time in each zone — so Europe's internal offsets never break during the transition, while North America's briefly do.

Does this gap change with the seasons?

This gap is seasonal. The abbreviations themselves are fixed offsets, but the region on CST switches to CDT (UTC−5) from March to November, and the region on CEST switches to CET (UTC+1) from late October to late March. So the 8-hour figure on this page is correct for the part of the year when both places are actually on these abbreviations, and changes by an hour outside it.

Because both sides shift, there are also short windows each spring and autumn when one has changed and the other has not — the two regions do not switch on the same date. A recurring meeting set during one of those windows is an hour out for a week or two, which is the most common way this catches people.

This is the reason scheduling systems store an IANA zone such as Region/City rather than an offset or an abbreviation: the zone knows its own rules and the offset does not.

Frequently asked questions