Moscow, 28 October 2015
(unofficial)
http://hselab.ru/news/mnogoobeshchayush ... v-hselab-v

based on this:
«The second master class scheduled for October 28 will be dedicated not to Bitcoin, but to the cryptocurrency Dash. Students will learn more about this currency’s enhanced privacy features, how to use it and how Dash’s blockchain differs from Bitcoin. The master classes are free of charge.»
http://cointelegraph.com/news/115465/bi ... er-classes