>Cetin,
>
>Just an update. I've retested with Sergey's and Rick's solution and I am now seeing similar results. Your patch for the random day value cured most of my ills. "Garbage in, garbage out." Thanks again.

Be carefull though. I could reproduce differences up to 28 days. All dates are related with 2/29 and 1/3 (who invented this calendar:)
Cetin