Tuesday, 13 October 2015 is the last day of standard support for SharePoint 2010 (another 5 years of self-help with no MS bug fixes and only security updates ant their discretion)
Don't panic, it is not as bad as it sounds
From and including: Friday, 15 February 2013To and including: Tuesday, 13 October 2015
It is 971 days from the start date to the end date, end date included
Or 2 years, 7 months, 29 days including the end date
Alternative time units
971 days can be converted to one of these units:
The good news is that SharePoint 2013 actually extends the life of your SharePoint 2010 investment through to 2018 via the deferred upgrade option. This lets you upgrade your server infrastructure without having to change the UI or 2010 based solutions (for the most part). It is not really an upgrade, more like install new servers and the attach the content databases from 2010. More on this later, but for now, rest easy and enjoy 2013 (the year) even if you are sticking with SharePoint 201 for the foreseeable future.