hi
this will give you end date = TEXT(TODAY(),"mm/dd/yyyy")
always have a date in 07/04/2013
in E1 = text(eomonth(today(),0),"mm")
in f1 = text(eomonth(today(),0),"yyyy")
in e3 = if(and(e1>="01",e1<="03"),f1-1,f1)
start date = text(CONCATENATE("01/04/",e3),"MM/DD/YYYY")
try this