I thought everyone I work with only used 4 digit years until last week. I saw some code where they were using test values for date parameters with 2 digit years. It was a fairly new report query too so I can't chalk it up to someone being young and not knowing better. Luckily we don't deal with future dates beyond about a year from the current date. Still good to know the cutoff so that if an issue does arise, I'll know where to look first.