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

Encyclopedia: Irish Standard Time

• dideoxyinosine
• Diderot
• didgeridoo
• Didion
• didn't
• dido
• Didrikson
• didst
• didymium
• die
• die away
• die down
• die off
• die out
• die-cast
• dieback
• Dieffenbachia
• Dieffenbachia sequine
• diegesis
• Diego Rivera
• Diego Rodriguez de Silva y Velazquez
• Diegueno
• diehard
• dielectric
• dielectric heating