Greenwich Mean Time (GMT) in winterIrish Standard Time (IST) in summer
Western European Standard Time = GMTIrish Standard Time (IST) = Western European Summer Time = GMT+1
DAYLIGHT SAVING TIME
UK and Europe Clock Change Rules
Clonmel Time is in the Western European Time Zone . Western European Standard Time ( WET ) is the same time as Greenwich Mean Time ( GMT ).
Like most countries in Europe, Summer (Daylight-Saving) Time is observed in Clonmel Time, where the time is shifted forward by 1 hour; 1 hours ahead of Greenwich Mean Time ( GMT+1 ).
After the Summer months the time in Clonmel Time is shifted back by 1 hour to Western European Time (WET) or (GMT)