A general list of some interesting upcoming conferences and workshops:

  in 2015  
  November 9-13: Direct and Inverse Problems for PDEs with Random Coefficients (Berlin, Germany)  
  December 14-18: Workshop on Navier-Stokes and Euler Equations (Vienna, Austria)  
  December 15: Workshop on Applied Problems with PDEs (Vienna, Austria)  
  December 16-18: Stochastic Limit Analysis for Reacting Particle Systems (Berlin, Germany)  
  in 2016  
  February 17-19: Winter School on Stochastic Homogenization (Augsburg, Germany)  
  February 18-19: Micromagnetics - Analysis, Numerics and Applications (Vienna, Austria)  
  March 1-4: German Probability and Statistics Days (Bochum, Germany)  
  March 7-11: Joint GAMM-DMV Annual Meeting (Braunschweig, Germany)  
  April 4 - May 25: Mixing Flows and Averaging Methods (Vienna Austria)  
  April 5-8: SIAM Conference on Uncertainty Quantification (Lausanne, Switzerland)  
  June 13-17: Entropy Methods, Dissipative Systems, and Applications (Vienna, Austria)  
  July 11-15: European Conference on Mathematical and Theoretical Biology (Nottingham, UK)  
  July 18-22: 7th European Congress of Mathematics (Berlin, Germany)  
  August 1-5: 16th Int. Conference on Hyperbolic Problems (Aachen, Germany)  
  August 8-11: SIAM Nonlinear Waves and Coherent Structures (Philadelphia, USA)  
  August: EuroSciPy (Erlangen, Germany)  
  September 12-15: Bridging-Time Scale Techniques and their Applications (Dresden, Germany)  
  September 19 - October 14: Multistability and Tipping (Dresden, Germany)  
  September 19-23: Conference on Complex Systems (Amsterdam, Netherlands)  
  in 2017  
  January 3 - April 21: Multiscale Problems - Algorithms, Numerical Analysis and Computation (Bonn, Germany)  
  April 3 - July 7: IHP - Stochastic Dynamics Out of Equilibrium (Paris, France)  
  May 21-25: SIAM Conference on Applications of Dynamical Systems (Snowbird, USA)  
  June 19-23: Brain Dynamics on Multiple Scales (Dresden, Germany)  
  September 11-15: ÖMG-DMV-Kongress (Salzburg, Austria)  
  September 11-15: SciCADE (Bath, UK)  
  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 :)  
  My blog (about practical issues in science)