#OTD in 1971 – Variously known as Decimal Day, Decimalisation Day and D-Day, the United Kingdom and the Republic of Ireland decimalised their currencies. Stair na hÉireannHistory, Irish HistoryCurrency, Decimal Day, Decimalisation Day, Northern Ireland, Republic of Ireland, RTÉ Archives, United Kingdom Decimal Currency D-Day 1971 55.378051-3.435973Share this:TwitterFacebookPinterestEmailPrintLinkedInTumblrWhatsAppSkypeRedditLike this:Like Loading... Related