Holidays can be very difficult when you are on a diet. They seem to revolve around food and drink.
If you are on a diet it can spell bad news. You have CHEATED!
So what, that is life! We need a bit of naughty foods.
The next meal is a new start. Go back to eating healthy food that provides good fuel for your body that you like to eat.
If you overcompensate and go on an extreme diet you will probably fall off that wagon very quickly so better to eat heathy and regularly instead.