If February=June
January=April
September=September
And August=April
Then what is March?

March is only.

February=June, => February =2 , June =6, so, 6-2=4
January=April,=>January=1, April =4 , so 4-1=3
September=September, September=8=> 8-8=0
Now observe the pattern... 4,3,0
and August=April...=>August =8, April=4 , so 8-4=4
then what is March=3 that is march only