Here are upcoming Feb - May 2014 meetings and conferences. You can find the full list on KDnuggets page: Meetings / Conferences on Analytics, Big Data, Data Mining, Data Science, & Knowledge Discovery.

Here the Business-Oriented meetings are in Blue, Research meetings in Green font.

February

• Feb 12-14, KNIME User Group Meeting, Zurich, Switzerland.
• Feb 18, Data Science Innovation Summit, Creating a Successful Data-Driven Culture, San Diego, CA, USA.
• Feb 19-20, Hadoop Innovation Summit, Don't Be Afraid of the Elephant in the Room, San Diego, CA, USA.
• Feb 19-20, Predictive Analytics Innovation Summit, Achieve Greater Insight Through Predictive Analytics, San Diego, CA, USA.
• Feb 24-26, Big Data for Defense and Government, Washington, DC, USA.
• Feb 24-28, WSDM-2014: Seventh ACM International Conference on Web Search and Data Mining, New York City, NY, USA
• Feb 27, Big Data & Analytics Innovation Summit, Creating a Successful Data-Driven Culture, Singapore.

March

• Mar 3-4, Machine Learning and Data Analytics Symposium (MLDAS), Doha, Qatar.
• Mar 4-5, NIST Data Science Symposium, Gaithersburg, MD, USA.
• Mar 6, Sentiment Analysis Symposium and Human Analytics Workshops, New York, NY, USA.
• Mar 16-20, eMetrics, San Francisco, CA, USA.
• Mar 17-21, PAW: Predictive Analytics World, San Francisco, CA, USA.
• Mar 19-20, GigaOM Structure Data, New York, NY, USA.
• Mar 19-21, TAW: Text Analytics World, San Francisco, CA, USA.
• Mar 21, 1st Swiss Workshop on Data Science (SDS|2014), Winterthur, Switzerland.
• Mar 21-23, iKDD Conference on Data Science, India.
• Mar 23-25, Big Data Exchange, Virginia, USA.
• Mar 26-27, Sports Analytics Innovation Summit, Winning in Sports Through Performance Analysis, London, UK.
• Mar 27, Open Analytics Chicago Summit, Chicago, IL, USA.
• Mar 27-28, Predictive Analytics Innovation Summit, Gain greater insight with Predictive Analytics, Hong Kong.
• Mar 27-28, Big Data Innovation Summit, Driving Business Success Through Big Data Science, Hong Kong.
• Mar 30 - Apr 1, INFORMS Conference on Business Analytics and Operations Research, Boston, MA, USA.
• Mar 31 - Apr 2, BigData TechCon, Learn HOW TO master Big Data, Cambridge, MA, USA.

April

• Apr 2-4, SBP14: Social Computing, Behavioral-Cultural Modeling, and Prediction, Washington DC, USA.
• Apr 7, WWW 2014 workshop on Big Graph Mining (BGM), Seoul, Korea.
• Apr 9-10, Big Data Innovation Summit, Take Control of your Data, Santa Clara, CA, USA.
• Apr 9-10, Data Visualization Summit, Data in. Decisions Out, Santa Clara, CA, USA.
• Apr 22-25, AISTATS 2014: 17th International Conference on Artificial Intelligence and Statistics, Reykjavik, Iceland .
• April 24-26, SDM'14: The 14th SIAM International Conference on Data Mining, Philadelphia, PA, USA.

May

• May 1-2, Gaming Analytics Innovation Summit, Reshaping the Industry with Data Insight, San Francisco, CA, USA.
• May 1-2, Sentiment Analysis Innovation, Leverage Social Signals to Business Advantage, San Francisco, CA, USA.
• May 1-2, Social Media & Web Analytics Innovation, Simplify Digital Analytics, San Francisco, CA, USA.
• May 7-9, PASS Business Analytics Conference, San Jose, CA.
• May 12-15, eMetrics, Toronto, Canada.
• May 12-15, Predictive Analytics World, Toronto, Canada.
• May 13-16, PAKDD-2014: The 18th Pacific-Asia Conference on Knowledge Discovery and Data Mining, Taiwan.
• May 14-15, Predictive Analytics Innovation Summit, Fostering Innovation in Predictive Analytics, London, UK.
• May 14-15, Big Data Innovation Summit, With Big Data Comes Big Responsibility, London, UK.
• May 14-15, Big Data & Analytics in Healthcare, Improve Outcomes with Big Data, Philadelphia, PA, USA.
• May 21-22, Chief Data Officer Summit, Creating a Data-Driven Culture to Drive Success, San Francisco, CA, USA.
• May 21-22, Business Analytics Innovation Summit, Gain Insights, Drive Business Planning, Chicago, IL, USA.
• May 21-22, Business Intelligence Innovation Summit, Delivering Bottom Line Impact Through Innovative Business Intelligence, Chicago, IL, USA.
• May 22-23, Open Data Innovation, Turning Raw Data Into Actionable Intelligence, Boston, MA, USA.
• May 27-31, The Second IEEE/ASE International Conference on Big Data Science and Computing, Stanford, CA, USA.

Here is the full list of Meetings / Conferences on Analytics, Big Data, Data Mining, Data Science, & Knowledge Discovery.