National Tulip Day
national tulip day dutch nationale tulpendag annual event january prelude tulip season netherlands event held dam square centre amsterdam since cancelled covid pandemic event took place museum square museumplein day special garden tulip cover square morning people view tulip gangway afternoon pick tulip free tulip north holland flower bulb cultivation netherlands keukenhof nationale tulpendag de telegraaf january gratis tulpen op de dam de telegraaf january gratis tulpen op de dam nrc january