First-year students at St Andrew's University in Scotland staged a huge shaving foam fight on the university's Lower College Lawn to celebrate Raisin Monday (23 October 2017).

Raisin Monday St Andrew's University foam
Russell Cheyne/Reuters

The tradition is thought to date back to the university's early days, when new students (or "freshers") would give senior students a pound of raisins as a thank-you for helping them to adjust to university life. In return, they would get a receipt written in Latin. Failure to produce the receipt could result in a dousing in the local fountain.

In the modern era, the raisins have been replaced with a bottle of wine, and the dousing with a foam fight. IBTimesUK presents some of the messiest photo from the annual event.

Raisin Monday is the culmination of the university's Raisin Weekend – an alcohol-fuelled rite of passage for new students.