The Dukes of Hazzard was definitely shown in Ireland, but I grew up in England. The UK got Dukes about five weeks after the US ('One Armed Bandits' debuted on January 26th in the US and March 3rd in the UK). It was initially shown at 9pm on a Saturday night (maybe a reflection of the more adult tone of the Georgia episodes), and as I was only eight at the time, I wasn't allowed to watch it very often. It then got an earlier slot and I became a regular viewer.
Last year I posted the original UK TV listing from 1979 to celebrate 40 years of Dukes - you can see that here.