For the first time in its history, the world famous Empire State Building here will be lit in green from Friday to Sunday in celebration of Eid-ul-Fitr.So far the landmark tower is lighted in traditional colours every year only on the occasion of Christmas and the Jewish festival Hannukah.From this year on, lighting on Eid, a three-day celebration by Muslims to mark the end of Ramadan, will become an annual event.In Islam, the colour green symbolizes a happy occasion.Soaring 1,454 feet above Midtown Manhattan, the Empire State Building was recently named America's most favourite building in the poll conducted by American Institute of Architects.