At 11:11 on the 11th day of the 11th month of the year, the Carnival period officially began in Germany. Known locally as "the fifth season", it is celebrated particularly enthusiastically in Cologne, where the city's football club 1. FC Köln are always glad to join in the festivities.

And as 1. FSV Mainz 05 also take part in the local customs a little further down the River Rhine, bundesliga.com takes a look at how the Bundesliga clubs are getting into the swing of things.

Kölle alaaf! (A local greeting during carnival season.)

Not your normal training session...

A duo to strike fear into defenders' hearts...

Yannick Gerhardt getting in on the fun...

Just the yellow card for Kevin Vogt...

All dressed up with nowhere to go? Simon Zoller and Leonardo Bittencourt...

Man's best friend...

Mainz dressed up to start the fifth season...

Bundesliga 2 side Fortuna Düsseldorf were also celebrating: "Even if it's tough, we wish everyone a good start to the carnival season"...