Having a few drinks at Christmas is, for some people, as much a part of the festive tradition as presents, decorations or carols. So if you find yourself nursing a hangover on Boxing Day, you might be interested to know what’s actually going on inside your body and why you feel so bad.

When we started Neyber, we set out to help employees be better with their money and knew that companies would benefit from the knock-on effect. Now, five years on, we know that we and our clients completely underestimated the impact a financial wellbeing programme would have.

It’s the most wonderful time of the year, when holiday parties collide with collegiate and professional athletics events. What do they all have in common? Booze, lots of it, and often free. It’s no wonder the lead reindeer has a red nose. Of course, drinking isn’t limited to a single season, but it holds a prominent place during the holidays. Across a few short weeks, consumption of spiked cider, boozy nog, wine, beer, cocktails and variations thereof may be higher than at any other point in the year. One industry study suggested that drinking doubles at this time of year. During this party time, we see up close the drinking habits of our partners, co-workers, relatives and, of course, ourselves.

More than 80% of people who make New Year’s resolutions have already given up on their goals by February. While there’s a lot of resolution advice on the internet, much of it fails to highlight the crux of behavioral change.