What is the ISO week number in Mountain Ash?

TimeDials shows the current ISO week number for Mountain Ash in real time. ISO week numbers follow the ISO 8601 standard, where week 1 is the week containing the first Thursday of the year.

Does Mountain Ash observe daylight saving time (DST)?

Yes, Mountain Ash observes daylight saving time. The next clock change is on 2026-03-29 (clocks move forward to GMT+1).

Time in Mountain Ash, Wales, United Kingdom — Local Time & Date

Live

--:--:--

Current local time in 🇬🇧 Mountain Ash, Wales, United Kingdom.

GMT/BST UTC+00:00

Relative to You

Detecting your timezone…

Relative to UTC

On UTC

Noon here = 12:00 UTC

ISO Week

11 Odd Week

Sun

06:34

17:53

Today

Mid-morning in Mountain Ash. Offices are busy, meetings are underway. The current offset is on UTC.

Daylight Saving Time

Last Clock Change

2025-10-26

Clocks moved back to GMT+0

Next Clock Change

2026-03-29

Clocks will move forward to GMT+1

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Quick Facts

Country	🇬🇧United Kingdom
State / Region	Wales
Timezone	GMT/BST
UTC Offset	UTC+00:00
DST	Yes — daylight saving time observed
Population	11,230
Elevation	116 m
Sunrise	06:34
Sunset	17:53
Coordinates	51.68°N, -3.38°E

Map

Map data © OpenStreetMap contributors

Time Difference to Major Cities

City	Difference	Local Time
New York	-4h	--:--
Los Angeles	-7h	--:--
Paris	+1h	--:--
Dubai	+4h	--:--
Mumbai	+5h 30m	--:--
Singapore	+8h	--:--
Tokyo	+9h	--:--
Sydney	+11h	--:--
Sao Paulo	-3h	--:--
Cairo	+2h	--:--
Shanghai	+8h	--:--

Frequently Asked Questions

What are the business hours in Mountain Ash?

Standard business hours in Mountain Ash are 09:00–17:00 local time (GMT/BST). Check the live clock above to see the current local time. Use our Time Zone Planner to find the best meeting time across cities.

What is the UTC offset for Mountain Ash?

Mountain Ash is currently at UTC+00:00. The timezone identifier is GMT/BST. When it is noon in Mountain Ash, it is 12:00 UTC. You can embed a live Mountain Ash clock on your website.

What ISO week number is it in Mountain Ash?

It is currently ISO week 11 (odd week) in Mountain Ash. ISO week numbers follow the ISO 8601 standard, where week 1 is the week containing the first Thursday of the year. Learn more about ISO week numbers.

Does Mountain Ash observe daylight saving time?

Yes, Mountain Ash observes daylight saving time (DST). The most recent change was on 2025-10-26, when clocks moved back to GMT+0. The next change is on 2026-03-29, when clocks will move forward to GMT+1.