Sunday February 29 , 2004 was Leap Year Day . This date , 2 29 04 , that only happens once every 4 years , matched the zip code of the Charlottesville Virginia Post Office , 22904 , which only happens once every 100 years . Special pictorial MR ZIP cancellation / 2-29-04 Leap Year Day - Date Meets Zip Station - It Only Happens Once A Century - Charlottesville , VA 22904 / on # 3370 , Year of the Dragon , and # 1094 , USA Flag Old Glory . 2 stamps on 1 Cacheted Event Cover . VF , See Scan . $1.00 shipping & handling to a USA address / $2.00 shipping & handling elsewhere . Combine S/H - Add 25 cents more for each additional item . Personal Checks and Money Orders must be drawn on a U.S. bank . Please view my other listings . Thank You . APS # 196666