If you change the day portion, you will not get 'same day'. However, if you change the year or the month without changing the day, you will. The reason is because i chose to compare the dates by the number of days - not the year and/or month.

Like I said, this is just to get you going.

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
F--F--F--F--F--F--F--F--
(the triplet paradiddle)