how to display 24 fortnight in sql server.

Question

how to display 24 fortnight in sql server.

 

e.g 

01 jan-15 jan --1 st  fortnight

16 jan -last day of month  --2 nd fortnight

 

01 feb-15 feb--3rd  fortnight

16 feb-last day of month --4th fortnight

 

till december