Offers over Christmas? Watch
Admin staff won't do anything when they are on holiday but they will work normal working weeks, not academic terms.
Academics catch up on paperwork any time of the day or night and certainly there have been people with Christmas Eve, if not Christmas Day offers.
But a change made on a system on 23rd may well feed through to UCAS over the 24th or 25th.
So any offers that *might* come through over that period are likely to be Christmas Eve/Christmas Day rather than in the period between christmas and new year.