And here, as usual, the article with the annual calendars Aviation airports Switzerland.
As you know on these calendars you can find the closing dates of the slopes, periods of night flights, any tutorials and many other interesting things. The surveillance flights for the WEF (from 22 to the 25 January 2019) They will originate from Payerne, taking Emmen and Meiringen as alternated in case of bad weather and / or problems.
To date there is still that of Locarno, I will publish as soon as available
PS: The calendars are available in PDF format by clicking on the calendar images