<P> Possible adjustments to the Irish practice were discussed by the Oireachtas joint committee on Justice, Defence and Equality in November 2011, but the government stated it had no plans to change . In November 2012, Tommy Broughan introduced a private member's bill to permit a three - year trial of advancing time by one hour, to CET in winter and CEST in summer . Debate on the bill's second stage was adjourned on 5 July 2013, when Alan Shatter, the Minister for Justice and Equality, agreed to refer the matter to the joint committee for review, and suggested that it consult with the British parliament and devolved assemblies . In July 2014, the joint committee issued an invitation for submissions on the bill . </P> <P> Closing time in Irish public houses was half an hour later during summer time (23: 30 instead of 23: 00). In 2000, the closing time hours were simplified by removing summer / winter time changes . Between 1933 and 1961, lighting - up time was an hour before / after sunrise / sunset in summer - time, as opposed to half - an - hour in winter time . Since 1961, it has been half - an - hour in all cases . A similar change in the definition of night for aviation was made in 1967 . </P> <P> The IANA time zone database contains one zone for Ireland in the file zone. tab, named Europe / Dublin . </P>

Is all of ireland in the same time zone