Translated, that's Munich Spring Fest. It's referred to as the little sister to Oktoberfest. Also, it's referred to as the unofficial start of summer. Either way, there's no Wikipedia article on it! Sure, there's one on the Stuttgart Frühlingsfest, which is apparently the biggest spring festival in Europe, but we aren't in Stuttgart, so back to Munich.
Our Frühlingsfest is basically two weeks celebrating at a carnival with beer tents, and every now and then, an extra something special. One morning, that was an old car gathering; a couple afternoons it was discounts for families; there was a small fireworks show one evening, etc.
If I learned one thing from going to the Fest on a lovely Friday afternoon, it was that the locals really do all dress in traditional trachte (lederhosen and dirndls) and we really will have to get some before Oktoberfest. In any case, here are a couple photos from the Munich Frühlingsfest.
a cookie and candy tent - in German
carnival ride with a historic church in the background
yet another carnival ride with the same historic church in the background
Bumper cars have sponsorships. There was also a BMW AMG, but I couldn't get a good photo of it.