Because Buddhism is a religion that requires body samruam oral the costume when there are ceremonies would attend the ceremony with the combination of white, but in everyday life it will wear normally.
Because Buddhism Is composed of body, speech and religion to dress appropriately. When a ritual ceremony, it will be a white dress. But in everyday life, it is a series regular.
Since Buddhism is a religion that have to body, speech, dress. When the ritual to the ceremony in white dresses. But in daily life, it will wear normal.