Conditional Formatting
=DATEDIF(DATE(YEAR(TODAY()),1,1),DATE(YEAR(TODAY()),12,31),"d")-DATEDIF(C2,TODAY()-1,"yd")<=15
Conditional Formatting
=DATEDIF(DATE(YEAR(TODAY()),1,1),DATE(YEAR(TODAY()),12,31),"d")-DATEDIF(C2,TODAY()-1,"yd")<=15