What is the due date for filing Singapore corporate income tax?

Each year, November 30th (for paper filling) or December 15th (for e-filling) is the due date for filing corporate income tax. Singapore taxation system implements prior year basis tax returns that means, 2014 tax filings are from the companies whose financial year ended between 1st January 2013 and 31st December 2013. Singapore companies have to file their estimated tax returns (known as \"ECI\") to IRAS within the 3 months from the end of their financial year.