The lowering of the flags at Wagah border is a daily military practice between India and Pakistan.
The ceremony takes place at sunset at the Wagah border (its Indian name is Attari), a border town between India and Pakistan. Wagah is 27km from Amritsar on the Indian side and 29km from Lahore on the Pakistani side.
Both sides have visitor galleries. I viewed the ceremony from the Indian side.
The ceremony is very theatrical with the marching involving the soldiers raising their legs as high as possible.
The soldiers march towards the gate at the border, which is opened. The soldiers will then salute each other and the both countries will start lowering their flags at the same time. The flags are then folded and the gates slams shut.