11 November: Remembrance Day (UK)

The 11th hour of the 11th Day of the 11th month
Remembrance Day (also known as Poppy Day and Armistice Day) commemorates those who died fighting in World War 1, World War 2 and other wars. Many people wear poppies (a red flower) in memory of those who died. At 11 a.m. there is a two-minute silence.