IF you’re planning a few drinks after work tonight, your boss might be a bit suspicious tomorrow because apparently December 15 is the biggest day of the year for at-work hangovers.

New findings from delivery service Go People show the seemingly mundane date is a terrible day for bosses and business owners across the country — as workers enjoy their office Christmas parties a little too much.

According to the study, there is a horrendous toll to all this frivolity. While you’re sipping on a carrot juice and watching Gilmore Girls for the third time on your hard-earned sickie tomorrow, a massive $12.8 million will be sucked out of the Australian economy — making it the least productive day of the whole year.

Christmas is the booziest time of the year for Aussies, according to ABS data.

It shows alcohol consumption is up in Australia with the average person drinking 9.7 litres of pure alcohol last year. That’s equivalent to more than two standard drinks every day.

December and January are also the booziest months in Australia, with the number of people consuming more than 15 standard drinks a week doubling, according to FebFast.

And the new Go People survey also delved into workers’ hangover habits at work, from sitting on the toilet and hiding to bragging about last night’s antics.

More than 60 per cent of people said they have not been hung-over at work this year — not even once. And, only 6.7 per cent of those hide in the bathroom when they’ve had one too many the night before.

Other popular techniques include aimlessly browsing the internet (18.5 per cent), doing boring admin work (19.9 per cent) and talking to everyone about your totally wild night (22.7 per cent).

If you are struggling tomorrow, Go People are delivering free hangover-buster kits throughout Brisbane, Melbourne and Sydney.

benjamin.graham@news.com.au