A general list of some interesting upcoming conferences and workshops:

  in 2014  
  April 23-25: Structured Integro-Differential Models in Mathematical Biology (Vienna, Austria)  
  May 29-30: Austrian Numerical Analysis Day (Vienna, Austria)  
  June 30 - July 4: Joint Meeting RSME-SCM-SEMA-SIMAI-UMI (Bilbao, Spain)  
  July 6-11: European Nonlinear Oscillations Conference (Vienna, Austria)  
  August 11-14: SIAM Nonlinear Waves and Coherent Structures (Cambridge, UK)  
  August 25-28: Conference on Control of Self-Organizing Nonlinear Systems (Warnemuende, Germany)  
  September 8-12: Dynamics Days Europe (Bayreuth, Germany)  
  September 24-25: 3rd Austrian Stochastics Days (Leoben, Austria)  
  December 2-12: School & Workshop on Optimal Transport (Linz, Austria)  
  in 2015  
  February 18-20: MATHMOD 2015 (Vienna, Austria)  
  May 17-21: SIAM Conference on Applications of Dynamical Systems (Snowbird, USA)  
  July 6-10: Equadiff 2015 (Lyon, France)  
  July 13-17: Conference on Stochastic Processes and their Applications (Oxford, UK)  
  September 21-25: DMV Jahrestagung (Hamburg, Germany)  
  in 2016  
  July 18-22: 7th European Congress of Mathematics (Berlin, Germany)  
  in 2019  
  July 15-19: International Congress on Industrial and Applied Mathematics (Valencia, Spain)  
  Past Conferences...  
  Courses taken over the years as a student... I can basically recommend all of them :)