On 13th September Finland celebrates the Day of the Stamp. Over 50 post offices issue their own personal stamps on that day. Most of them showing the local buildings. Shown here are two maxi cards issued by a PO in Helsinki. One of cards (with the black and white stamp, showing the mail sorting area) shows the PO building in 1938 when it was finished. The other card with a colourful stamp on it, is the personal stamp of a PO from the year 2009. The postmarks on the cards are special ones for the Stamp Day in 2010. (Postimerkin päivä means The Stamp Day).Thanks Ella for the cards.