Which zone this page means. CET is winter time; CEST (UTC+2) applies from the last Sunday in March to the last Sunday in October. Europe changes on different dates from the United States, so the gap to US zones shifts for a few weeks each spring and autumn. MST is standard time only; MDT (UTC-6) applies from March to November. Arizona stays on MST all year.
CET is ahead of MST by 8 hours today
On 19 August 2026, Central European Time is on CEST at UTC+02:00 and Mountain Standard Time is on MDT at UTC-06:00. The gap between them is 8 hours, with MST behind. So 9:00 am in CET is 1:00 am in MST, and 5:00 pm in CET is 9:00 am in MST. Going the other way, see MST to CET.
The gap is not constant, and that is the part that catches people out
Central European Time is currently observing daylight saving and changes next on 25 October 2026, when clocks go back an hour. Mountain Standard Time is currently observing daylight saving and changes next on 1 November 2026. Because the two zones change on different dates — EU rules for CET and US rules for MST — there are a few weeks each year when the usual gap between them is an hour out. That window is the single most common source of a missed call between these two zones, and it is why a page that quotes only the nominal offset is wrong for part of the year.
When you can actually both be at work
Taking a working day as 9:00 am to 5:00 pm local at each end, there are 0 overlapping hours in a normal day. There is none: the two working days do not touch at all, so any live meeting between Central European Time and Mountain Standard Time has to sit outside somebody's normal hours. The table above shows which end has the shorter stretch to give up.
Zone rules are set by legislation and change, sometimes at short notice. This page is built against tzdata 2026a, last reviewed 2026-08-18. Quarterly. Zone rules change by legislation, sometimes at short notice. Version and review date are shown on every zone page. The converter above reads your browser's own copy of the zone database, so if a rule has changed since this page was built the live answer follows the new rule.
Every convention used above — whether the start date counts, how month ends are clamped, which holidays close an office — is written out on the methodology page, including the daylight-saving rules behind the 8-hour gap above.