I happened to pop in to Mercadona this morning. At the tills there were notices saying that the shop will be closed on Thursday 13 and Friday 14 April for Easter.
While I was there I also noticed a spelling mistake on one of their big signs. At the end of the fridges that hold the milk and yoghurts there is a big sign hanging from the ceiling that advertises coffes instead of coffees. I have no idea how long I have walked through Mercadona and never noticed this before.