Western European Summer Time

BST redirects here, for the Bangladeshi time zone, see Bangladesh Standard Time

Western European Summer Time (WEST) is a summer daylight saving time scheme, 1 hour ahead of Coordinated Universal Time. It is used in the following places:

• the Canary Islands
• the Faroe Islands
• the Republic of Ireland
• the Crown dependencies
• the Madeira islands
• Continental Portugal
• the United Kingdom
• Morocco in North Africa

Time zones of Europe in relation to UTC:

Blue	Western European Time (UTC±00:00) Western European Summer Time (UTC+01:00)
Light Blue	Western European Time (UTC±00:00)
Red	Central European Time (UTC+01:00) Central European Summer Time (UTC+02:00)
Ochre	Eastern European Time (UTC+02:00) Eastern European Summer Time (UTC+03:00)
Yellow	Kaliningrad Time (UTC+02:00)
Green	Moscow Time / Turkish Time (UTC+03:00)

▉▉▉ Pale colours: Standard time observed all year
▉▉▉ Dark colours: Summer time observed

Western European Summer Time is also known by other names:

• British Summer Time (BST) in the United Kingdom.
• Irish Standard Time (IST) (Am Caighdeánach na hÉireann (ACÉ)) in Ireland. This is sometimes called Irish Summer Time (Am Samhraidh na hÉireann).

The scheme runs from the last Sunday in March to the last Sunday in October each year. At both the start and end of the schemes, clock changes take place at 01:00 UTC. During the winter, Greenwich Mean Time (UTC+0) is used.