After the first and second Bitcoinference in Amsterdam, we will now have the third
Bitcoinference 2015 again in Amsterdam. From wednesday
21 till friday
23rd of January. Saturday
24th there will also be a
Bitcoin Hackathon"Bitcoinference 2015 Amsterdam covering the business and scientific part of Bitcoin, currencies and their derivatives"
http://www.bitcoinference.com/https://www.blocktrail.com/hackathon