Dry January is a custom of abstaining from alcohol for the month of January, particularly practised in the United Kingdom.
In Britain, it's bottoms up from the week before Christmas till the last firework explodes in the sky announcing the new year.
The term "Dry January" was registered as a trademark by the charity Alcohol Concern in mid-2014; the first ever Dry January campaign by Alcohol Concern occurred in January 2013.
In January 2014 according to Alcohol Concern, which initiated the campaign, over 17,000 Britons stopped drinking for that month.