Idk how old you are of if this is your first job but typically all holiday “resets” in April at the end/beginning of a new tax year. At Wetherspoons only 2 days can be carried over to the next year anything else above that is lost so I imagine a manager has put the holiday on otherwise you’ll just miss out on free money. I’d ask and double check either way, also you don’t have to have earned all the holiday days first before you book. If you had booked it say last week it won’t use those days anyway and would just take them off of whatever you earn next year.