Remembrance day

During these days children and teachers wear a poppy flower on their jackets. In the streets, there are banners, such as the one in the photo, and wreaths on those monuments dedicated to the soldiers dead in WWI.

"Remembrance Day (sometimes known informally as Poppy Day owing to the tradition of the remembrance poppy) is a memorial day observed in Commonwealth member states since the end of the First World War to remember the members of their armed forces who have died in the line of duty" ( Wikipedia)