Microsoft has issued a list of products that will reach end of support in the second half of 2014 and in the two weeks of January 2015 as part of its routine support lifecycle product database



From Techradar:

The most important product included on the list is Windows 7. Mainstream support for its 10 flavours will end on January 13 2015 at which date it will transition to Extended Support (which will end in 2020) and will include security updates and paid hotfix support.

  Windows 7 makes appearance in Microsoft end-of-support list