Loon - Hope you don't have anyone in your family that celebrates any special days on a leap year because the way you calculate dates is a first to me.

HL's 10th Anniversary Piece came out in Jan. 2001 and retired in Dec. 2001. The entire year of 2001 was their 10th year of exhistance. HL will celebrate their 20th year of existance during the entire year of 2011. The exact date they started business is their anniversary date and it was sometime in 1991 but their 10th year of existance was 2001 and their 2oth year of existance will be 2011. Their 20th anniversary date will be the date in 2011 that they actually started their business in 1991.