When will the 2017 Christmas Number 1 be announced?

Here's everything you need to know about this year's Official Christmas Number 1.

The race to be the UK's Christmas Number 1 has been a festive tradition for decades – since way back in 1952 when Al Martino first claimed the snow-capped summit with Here in my Heart.

The full Christmas Top 40 will then be counted down on BBC Radio 1's Official Chart, with Greg James, on Friday 22 December from 4pm.

The chart and Official Christmas Number 1 will also be available on OfficialCharts.com, with the full Top 100 revealed at 5:45pm.

Last year, Clean Bandit fought off stiff competition from a rake of huge acts and special campaigns to score the Christmas Number 1 with Rockabye. Look back at every Official Christmas Number 1 ever.

This year's contenders include Ed Sheeran's Perfect, propelled by new versions featuring Beyonce and Andrea Bocelli, while there is also a campaign to get Wham's Last Christmas to the top, one year after George Michael's death. The track missed out on the top spot on its original release in 1984, and remains the UK's biggest selling Number 2 single. Check out the full list of contenders.

Anyone who wants to be in with a chance of finding the award for the Official Christmas Number 1 under their tree has to make sure their single is available during the week before the cut-off point for sales and streams to be counted toward the chart, which in 2017 is midnight on December 21. 

Make sure you’re following Official Charts on Twitter and on Facebook for updates throughout the race! Join in the Christmas Number 1 conversation using #XmasNo1 and #OfficialChart.