In the graph below you see the time zone difference between British Summer Time and Central Daylight Time. Drag the bubble to adjust the time and to see the corresponding time in the other time zone.
British Summer Time is the time zone of the United Kingdom when observing daylight saving time in the summer, including cities like London, Dublin and Glasgow. Central Daylight Time is the time zone of the central US and Canada, as well as most of Central America when observing daylight saving time in the summer, with places like Winnipeg, Chicago, Dallas, Houston and Mexico City.
Usually it is preferable to schedule meetings in the afternoon for the person in BST and before lunch for the person in CDT.
More BST conversions
BST to MDT, BST to GMT, BST to IST, BST to EST, BST to PST
More CDT conversions
CDT to MDT, CDT to EST, CDT to IST, CDT to GMT, CDT to PST
British Summer Time, or sometimes called British Standard Time, is the timezone of the United Kingdom in the summer months. It does not have a typical counterpart like most summer/winter pairs but is an exception to adjust for the dark winters in the UK!
United Kingdom only, including the Isle Of Man
All cities in the United Kingdom (England, Scotland, Wales and Northern Ireland), such as London, Manchester, Edinburgh, Cardiff and so on.
BST is the summer time equivalent of GMT. So for half the year the UK is on Greenwich Standard Time and the rest of the year they observe British Summer Time which is one hour ahead.
While GMT is observed in many places in addition to the UK BST is only observed in Britain (as the name suggests). Not even Ireland are on BST in the summer, instead they have their own time zone for this.
Central Daylight Time is the time zone of the central US and Canada, as well as Mexico and most of Central America. It is five hours behind UTC and is observed during the summer months, between March and November. Sometimes the zone is referred to as CDST – Central Daylight Saving Time Zone. In the winter CDT becomes CST – Central Standard Time.
CDT is observed in the US, Canada, Mexico, Belize, Costa Rica, Guatemala, El Salvador, Nicaragua, Panama and Honduras i.e. all Central American countries. In the US it is only the states in the central US that observes CDT, from Wisconsin in the West to Tennessee in the East, and from Michigan in the North to Florida in the South. Similarly, only Canadian provinces in the middle of the country observe CDT. All of Mexico observes CDT, except the North West corner of the country.
US: Alabama, Iowa, Louisiana, Texas, Nebraska, Oklahoma, Illinois and many more.
Canada: Manitoba, Ontario (most parts), Saskatchewan (only Creighton and Denare Beach)
Mexico: Chiapas, México, Oaxaca, Yuca tán, San Luis Potosi and more.
CDT is the daylight saving time of Central Standard Time. There are only a handful of exceptions in this time zone that do not observe DST, so it is advisable to always check the exact location (e.g. using our time zone converter) instead of relying on time zone abbreviations.