The approximate times of this festival are 09:00 - 15:00, but that is a guess. Passing through Matale on the bus at about 11:30 on Saturday 23rd March 2018, we encountered a Hindu procession leaving the Sri Muthumariamann Kovil. I guess it began early in the morning and its obviously a parade to somewhere. More than this I cannot tell you, and the pictures speak for themselves. It may be an annual festival, presumably on this Saturday.