I've made some illustrations last year for the 2016 calendar of my internship company, SMS-Timing. The calendar was a gift for their clients. This was a project I worked on with another trainee. The company creates soft- and hardware for indoor kartingcentres, so it made sense to use the subject "tracks and kartings". Since flat design is really popular - and they had already used pictures in the previous calendar - we chose to go for that style.
So down below are some pictures of the illustrations that I've made. Sadly I don't own the original .ai files. Oh and the 'noise' you see could be the texture we used on all the images. Some soft grungy and grainy stuff.