Ashoura Day falls on the 10th of the Islamic month of Muharram and is preceded by days of commemoration and remembrance.
The 480 BC Battle of Salamis is seen by many historians as a turning point in history that allowed ancient Greece to flourish.
The fallout from the Treaty of Trianon - signed 100 years ago today - has echoes in current tensions between Hungary and its neighbours, where some two million ethnic Hungarians still live.
Police emerged from the nearby Mong Kok police station to clear the roads but confrontations continued for hours.
On the fourth anniversary of the November 13, 2015 terror attacks, French government officials will commemorate the victims of the deadliest day witnessed in the French capital since World War II.