Following the new variant of Coronavirus, First Minister Mark Drakeford has told people to “Stay at home”.
Plans to relax rules between the 23rd to 27th December have been scrapped.
Meeting loved ones has now been limited to Christmas Day.
Mr Drakeford has said hundreds of people have already contracted the new, “more aggressive” variant of the virus in Wales.
“While we all want to avoid further disruption to businesses and plans for Christmas, our overriding duty is to protect lives here in Wales,”
The Wales-wide lockdown, set to come into effect on the 28th December, has been brought forward.