Cardiff Time to EST Converter

EST is 5 hours behind GMT. 9:00 AM GMT = 4:00 AM EST.

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Cardiff, UK
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Eastern Standard Time
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EST is 5 hours behind GMT at the moment. To convert Cardiff Time to EST, subtract 5 hours from the Cardiff Time time: 9:00 AM GMT = 4:00 AM EST.

Cardiff Time (Cardiff time) is used in Cardiff, UK. EST (Eastern Time) is used in New York, Washington DC, Florida, Georgia, Ohio, Michigan, Ontario, Quebec, Panama and Jamaica (all year).

Cardiff Time to EST time conversion table

Cardiff Time to EST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.

Cardiff TimeESTDay
12:00 AM GMT7:00 PM ESTprevious day
1:00 AM GMT8:00 PM ESTprevious day
2:00 AM GMT9:00 PM ESTprevious day
3:00 AM GMT10:00 PM ESTprevious day
4:00 AM GMT11:00 PM ESTprevious day
5:00 AM GMT12:00 AM ESTnight
6:00 AM GMT1:00 AM ESTnight
7:00 AM GMT2:00 AM ESTnight
8:00 AM GMT3:00 AM ESTnight
9:00 AM GMT4:00 AM ESTnight
10:00 AM GMT5:00 AM ESTnight
11:00 AM GMT6:00 AM EST—
12:00 PM GMT7:00 AM EST—
1:00 PM GMT8:00 AM EST—
2:00 PM GMT9:00 AM ESTwork hours
3:00 PM GMT10:00 AM ESTwork hours
4:00 PM GMT11:00 AM ESTwork hours
5:00 PM GMT12:00 PM EST—
6:00 PM GMT1:00 PM EST—
7:00 PM GMT2:00 PM EST—
8:00 PM GMT3:00 PM EST—
9:00 PM GMT4:00 PM EST—
10:00 PM GMT5:00 PM EST—
11:00 PM GMT6:00 PM EST—
  • Work rows — 9 AM–5 PM in both places
  • Night in the destination (10 PM–6 AM)

How to convert Cardiff Time to EST

Subtract 5 hours from the Cardiff Time time to get EST.

Example: 9:00 AM GMT = 4:00 AM EST.

Across midnight: 1:00 AM GMT = 8:00 PM EST (previous day). The date changes, so always check the day as well as the hour.

Time difference between Cardiff Time and EST

The time difference between Cardiff Time and EST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:

  • 1 Jan 2026 – 7 Mar 2026: EST is 5 hours behind of Cardiff Time.
  • 8 Mar 2026 – 28 Mar 2026: EST is 4 hours behind of Cardiff Time.
  • 29 Mar 2026 – 24 Oct 2026: EST is 5 hours behind of Cardiff Time.
  • 25 Oct 2026 – 31 Oct 2026: EST is 4 hours behind of Cardiff Time.
  • 1 Nov 2026 – 31 Dec 2026: EST is 5 hours behind of Cardiff Time.

Cardiff Time and EST during daylight saving time

  • Cardiff Time next changes on 28 Mar 2027: clocks go forward one hour at 00:59 local time, from GMT (UTC+0) to BST (UTC+1).
  • EST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from EST (UTC−5) to EDT (UTC−4).

Best time for a meeting between Cardiff Time and EST

Cardiff Time and EST share 3 hours of the 9 AM–5 PM working day. Any time between 2:00 PM and 5:00 PM GMT lands between 9:00 AM and 12:00 PM EST, inside working hours for both.

Plan a meeting across more time zones.

Cardiff Time to EST FAQ

What is the time difference between Cardiff Time and EST?

Right now EST is 5 hours behind GMT. The gap changes 5 times in 2026 because the two sides switch to daylight saving time on different dates.

What is 9 AM Cardiff Time in EST?

9:00 AM GMT is 4:00 AM EST.

What is 12 PM (noon) Cardiff Time in EST?

12:00 PM GMT is 7:00 AM EST.

Is EST ahead of or behind Cardiff Time?

EST is 5 hours behind GMT, so it is earlier in EST than in Cardiff Time.

Does Cardiff Time change for daylight saving time?

Yes. Cardiff Time next changes on 28 Mar 2027, when clocks go forward one hour from GMT to BST.

Does EST change for daylight saving time?

Yes. EST next changes on 14 Mar 2027, when clocks go forward one hour from EST to EDT.

What is the best time for a meeting between Cardiff Time and EST?

Cardiff Time and EST share 3 hours of the 9 AM–5 PM working day. Any time between 2:00 PM and 5:00 PM GMT lands between 9:00 AM and 12:00 PM EST, inside working hours for both.

Is ET the same as EST?

EST is the winter (standard) name of Eastern Time (ET). From March to November the same clocks are called EDT. This converter always uses the one in force on the date you choose.

Related conversions

Convert EST to Cardiff Time

Convert Cardiff Time to other time zones

Convert other time zones to EST

Learn more

Updated 7 November 2026. Time zone data: IANA tz database.