An increasing number of people are working on Christmas Day, with hospitals, hotels and pubs asking more staff to forego a festive break, according to a new study.
The TUC said almost 172,000 workers were on duty on December 25 in 2010, a 78% increase compared with 2004.
There were equal numbers of men and women going to work on Christmas Day, with those in NHS and social care making up the biggest group.
TUC general secretary Brendan Barber said: "There has been a significant increase in the number of people working on Christmas Day in recent years, reflecting the changing nature of the way we live our lives.
"Unions have worked hard to make sure that the UK's Christmas Day employees get premium rates, earning double or even triple their normal pay.
"But whether it be the emergency services, those in the health service, call centre workers, people working in petrol stations or in hotels and restaurants, let's remember all those whose work helps keep the country ticking over while the rest of us are enjoying ourselves."