I fell foul of these "Bank Holidays" back in 2004,
Flew to New York on 26th of December for a bit of shopping, ringing in the new year in Times Square and proposing to Miss C.
That night while putting my CC into a new wallet my the card snapped in half and IIRC we didn't have debit cards then.
So a quick phone call to Mastercard and within 24 hours there was a replacement card for me at hotel reception
But for some reason it didn't work kept been rejected by retailers, turns out it has to be switched on by the issuing bank who of course where on holidays and weren't going to be able to authorise the card for at least a couple of days
So luckily herself had a card and she got an introduction into my shopping habits as she had to follow me around paying for everything
Anyhow card got switched on a day before we left and had a new card shortly after we returned
Happened to mention it to my business manager in my branch and she told me to write a letter of complaint to BOI Credit cards
Which I did and got a letter back apologising for any inconvenience to me and if I'd like to take my new fiancé out for a meal, I could send them the receipt and they would refund the amount to my CC by way of apology
As it happened we were going out to dinner with a few friends to celebrate our engagement, nothing too fancy but when the bill arrived for €600,
I put it all on the CC and sent it off to BOI not expecting them to pay the full amount but they did