Verb conjugation of "contravene" in English

Please take into account, that on May 10 and 11 there are holidays in the United States and that we do not work on Saturday. This will leave only the 15th, 16th and 17th for a company visit.
The snow can be compared with white veil. Here in Davos, there is lots of new snow, so fresh and powdery snow, which is great for skiing. One needs to be careful from unexpected avalanches.
I've never been to Switzerland, but I'd like to go to the Alps. Until now I was only in Austria and in France. Maybe I will go there, for example skiing in Davos or in another nice mountain village.