Post office sorting office opening hours for Christmas?

I was in the other day and saw they have extended opening hours for Christmas - does anyone know what they are (today specifically - Sunday?). Can’t find it online

Hmm, ok thanks. I guess I didn’t miss them today then… no, no relation

By the way in case anyone’s confused by this, they were actually open on Wednesday until 8pm as usual despite the fact it says 17.30 on that card.