Compare CST and BST
See the current time difference between CST and BST, how daylight saving affects the offset, and the best hours to schedule meetings.
How to Find the Time Difference Between CST and BST
Open the CST vs BST comparison page: Visit https://www.xconvert.com/time-converter/cst-vs-bst to load a visual grid with CST and BST already shown as comparison rows. This page is useful when you are scheduling a supplier call between Central Time in North America and the United Kingdom during British Summer Time, especially for industries like manufacturing, SaaS support, logistics, and finance that regularly coordinate between cities such as Chicago, Dallas, Houston, and London.
Add relevant comparison cities with the “+ Add City” button: Click “+ Add City” and search for cities such as Chicago, Mexico City, and London if you want to compare how Central Time behaves across major business hubs and how it lines up with BST. This is especially helpful for teams handling US-UK client meetings, airline operations, commodity trading, or remote engineering handoffs, because Chicago is a major financial and transport center, London is a global banking hub, and Mexico City is often relevant for regional operations in the Central Time zone.
Drag across the grid to select a meeting window: Click “Select” if needed, then drag across the CST row from 9:00 AM to 11:00 AM CST to highlight a purple range; the BST row will show that this corresponds to 3:00 PM to 5:00 PM BST when the standard 6-hour difference applies. This visual check is practical for confirming that a mid-morning call in Central Time lands in the late afternoon in the UK, which is usually workable for sales demos, legal reviews, and project status meetings, while a 4:00 PM CST meeting would already be 10:00 PM BST, too late for most London-based teams.
Export the selected time for sharing: After selecting the range, use the export options shown on the page — ICS download, Google Calendar, Gmail, Copy to clipboard, and Share link — to send the chosen slot to colleagues or clients. For example, a distributed team can download the ICS file so the meeting appears in each person’s local calendar automatically, or use Share link and Copy to clipboard to send a confirmed CST-to-BST overlap in Slack, email, or a client booking workflow.
CST vs BST Offset Explained
CST is normally 6 hours behind BST. When it is 9:00 AM in CST, it is 3:00 PM in BST; when it is 12:00 PM noon in CST, it is 6:00 PM in BST. This makes the best overlap for same-day business communication typically fall between about 8:00 AM and 11:00 AM Central Time, which maps to 2:00 PM to 5:00 PM in the UK during British Summer Time.
The seasonal detail matters because BST itself is a daylight saving time zone, while CST usually refers to Central Standard Time (UTC-6). BST = UTC+1, and CST = UTC-6, so the exact difference is 7 hours if you are comparing strict standard offsets only. However, many users searching “CST vs BST” are actually comparing US Central Time during daylight saving with British Summer Time, and during that period CDT (UTC-5) vs BST (UTC+1) produces the commonly used 6-hour difference.
In the United Kingdom, British Summer Time starts on the last Sunday in March and ends on the last Sunday in October. In 2025, BST begins on 30 March 2025 and ends on 26 October 2025. In the United States and Canada, Central Time switches to daylight saving on the second Sunday in March and returns to standard time on the first Sunday in November; in 2025, that means 9 March 2025 to 2 November 2025 for daylight saving observance in places such as Chicago, Dallas, and Houston.
Because the US and UK change clocks on different dates, the time gap is not always the same during transition weeks. Between 9 March 2025 and 30 March 2025, the UK is still on GMT (UTC+0) while much of the US Central region is already on CDT (UTC-5), so the difference is only 5 hours. Then from 26 October 2025 to 2 November 2025, the UK has returned to GMT while US Central locations remain on CDT, so the difference is again 5 hours for that short period.
This distinction is important for real scheduling. A London fintech team arranging a call with a Chicago trading desk, or a UK retailer coordinating shipment timing with a Dallas logistics provider, can easily miss a meeting by one hour during the March and October/November transition windows. If you are booking flights, webinars, earnings calls, or support coverage, always check the specific date rather than relying on the usual “CST vs BST” shorthand.
Frequently Asked Questions
What is the time difference between CST and BST right now?
In strict offset terms, CST (Central Standard Time, UTC-6) is 7 hours behind BST (British Summer Time, UTC+1). However, many real-world comparisons involve US Central Daylight Time (CDT, UTC-5) during the months when the UK is on BST, and in that common seasonal scenario the difference is 6 hours, so 9:00 AM in Central Time equals 3:00 PM in BST.
Is CST always 6 hours behind BST?
No, CST is not always 6 hours behind BST. If you mean true Central Standard Time, the difference to BST is 7 hours, but if the US Central region is observing daylight saving time as CDT, then the gap becomes 6 hours; during the short DST transition periods in March and late October, the difference can even be 5 hours.
Why does the CST to BST time difference change in March and October?
The difference changes because the United States and the United Kingdom do not switch clocks on the same dates. In 2025, US Central daylight saving starts on 9 March, while BST does not begin until 30 March, and BST ends on 26 October while US Central daylight saving continues until 2 November, creating temporary weeks where the gap is 5 hours instead of 6 or 7.
When is the best meeting time between Central Time and British Summer Time?
For most office-based teams, the best overlap is usually 8:00 AM to 11:00 AM Central Time, which corresponds to 2:00 PM to 5:00 PM BST when the common daylight-saving alignment applies. This window works well for client presentations, software sprint reviews, recruitment interviews, and cross-Atlantic operations calls, because it stays inside standard business hours for both North America and the UK.
What does BST mean compared with GMT?
BST stands for British Summer Time, which is UTC+1, while GMT stands for Greenwich Mean Time, which is UTC+0. The UK uses BST during the warmer months — from 30 March 2025 to 26 October 2025 in 2025 — and returns to GMT outside that period, which is why UK meeting times shift by one hour relative to other regions depending on the season.
Which cities commonly use CST when comparing with BST?
Major cities commonly associated with the Central Time zone include Chicago, Dallas, Houston, Winnipeg, and, seasonally depending on local rules, parts of Mexico such as Mexico City. These cities are important in sectors like commodities trading, aviation, manufacturing, healthcare support, and enterprise software, so CST-to-BST comparisons are common when working with London, Manchester, Birmingham, and other UK business centers.
How do I avoid scheduling mistakes between CST and BST?
Use the exact meeting date and verify whether you are dealing with CST, CDT, BST, or GMT rather than relying on abbreviations alone. In practical terms, this matters for board meetings, customer support shifts, international interviews, and flight coordination, because a one-hour DST mistake can cause missed connections, delayed handoffs, or clients joining at the wrong local time.