1. A form of daylight-saving time, one hour ahead of UTC, used in the United Kingdom, Ireland and mainland Portugal in summer
   - BST, Irish Standard Time, Western European Summer Time

Encyclopedia: British Summer Time

• Polygala paucifolia
• Polygala senega
• Polygala vulgaris
• Polygalaceae
• polygamist
• polygamous
• polygamy
• polygene
• polygenetic
• polygenic
• polygenic disease
• polygenic disorder
• polyglot
• polygon
• Polygonaceae
• polygonal
• polygonal shape
• Polygonales
• polygonally
• Polygonatum
• Polygonatum biflorum
• Polygonatum commutatum
• Polygonia
• Polygonia comma
• Polygonum