A general list of some interesting upcoming conferences and workshops:

  in 2015  
  February 18-20: MATHMOD 2015 (Vienna, Austria)  
  March 12-13: GAMM 'Dynamics and Control' Workshop (Hamburg, Germany)  
  March 23-27: GAMM Annual Meeting 2015 (Salento, Italy)  
  May 13-16: 13th Viennese Workshop on Optimal Control and Dynamic Games (Vienna, Austria)  
  May 17-21: SIAM Conference on Applications of Dynamical Systems (Snowbird, USA)  
  June 1-19: Dynamics of Multi-Level Systems (Dresden, Germany)  
  June 6-8: 1st International Conference on Mathematical NeuroScience (Antibes, France)  
  June 29 - July 3: MURPHYS-HSFS School (Levico Terme, Italy)  
  July 6-10: Equadiff 2015 (Lyon, France)  
  July 13-17: Conference on Stochastic Processes and their Applications (Oxford, UK)  
  July 27-31: Dynamics of Coupled Oscillators (Dresden, Germany)  
  September 6-10: Dynamics Days Europe (Exeter, UK)  
  September 14-18: SciCADE 2015 (Potsdam, Germany)  
  September 21-25: DMV Jahrestagung (Hamburg, Germany)  
  September 28-29: 4th Austrian Stochastics Days (Vienna, Austria)  
  October 26-30: MBI Workshop on Uncertainty, Sensitivity and Predictability (Columbus, USA)  
  in 2016  
  February 1 - April 29: Advances in Nonsmooth Dynamics (Barcelona, Spain)  
  March 1-4: German Probability and Statistics Days (Bochum, Germany)  
  April 5-8: SIAM Conference on Uncertainty Quantification (Lausanne, Switzerland)  
  July 18-22: 7th European Congress of Mathematics (Berlin, Germany)  
  August 1-5: 16th Int. Conference on Hyperbolic Problems (Aachen, Germany)  
  September 12-15: Bridging-time scale techniques and their applications in atomistic computational science (Dresden, Germany)  
  19 September - 14 October: Multistability and Tipping (Dresden, Germany)  
  in 2017  
  September 11-15: ÖMG-DMV-Kongress (Salzburg, Austria)  
  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 :)