Who started poppy day?

Poppy Day, also known as Remembrance Day or Armistice Day, was initiated by the Royal British Legion in 1921 to honor fallen soldiers from World War I. The idea was inspired by the poem "In Flanders Fields" by Lieutenant Colonel John McCrae, which references the red poppy as a symbol of remembrance. The use of the poppy as a commemorative symbol became widespread, particularly in the UK, to commemorate military personnel who have died in conflicts.