title: How to change photo according to current month?
body: <p>I want to build a Photo Calendar app.
  As a beginner my question is -
  I draw 12 picture using Photoshop for 12 months, and placed in my app . But I need to know how to make them arranged so , </p>
  
  <p>when some one opened the app 
  If current month is January then 1st picture seen in home
  If current month is February then 2nd picture seen in home
  And so on</p>
  
  <p>Thank You</p>