The Traditions of the locals of Istanbul are affected by their religion in addition to the surrounding area. Such a city was the capital of the Ottoman Empire till 1923; thus, it still has the palaces of Ottoman Sultans and their families. As a tourist, you will need to get an idea about the traditions of the locals of Istanbul to define the best and most suitable occasion for your visit.
http://inminutes.com/amazing-traditions-for-different-occasions-in-istanbul/