Why Filename Date And Metadata Date Of My Picture Differ?

[TechnicGeek]

When I take pictures on my Nexus 4, filename always has a date and time of picture taken. Strangely enough, they both do not match date and time of meta data of picture. Below take a look at picture:



Filename claims picture was taken on 2014-03-02, 7:27AM but meta data claims something different and I don't even know if its past year or present 2014 year. Why such discrepancy?