Postcards, sent with first day postmarks from Latvia

Two postcards, sent from Latvia, with first day postmarks

 First day postmark "100th anniversary of Moricsala reserve" and postcard "100 years of nature protection in Latvia", June 6th, 2012

First day postmark "Museum Night 2012" and postcard "Museum Night 2012" -Pauls Stradins Museum for history of medicine. Stamp issued earlier - in 2007.