Songkok is a traditional Malay cap. Skull cap is worn as clothing pelangkap the Malays used to attend certain events. This skull cap sites for the Malay community in Malaysia, Singapore, Indonesia and southern Thailand. This skull cap is said to originate from the Ottoman fez worn in Turkey. It is a symbol of Islamic identity and become popular among Indian Muslims and by then gradually become experts in the Malay songkok. In Indonesia, also known as the skull cap cap.
In Malay literature, skull cap I have mentioned in Syair Zubaidah Chinese War (1840) "... a white shirt red bersongkok ....".
In Indonesia, the skull cap to be wearing the official head popularized by Sukarno. Skull cap worn by the people of Indonesia for formal occasions like wedding ceremonies or religious holidays as vacation days Aidil Fitri and Aidil Adha.
For the Malays, a skull cap wearing head-uparaca official while attending an official ceremony as a marriage ceremony, Friday prayers, and during the ceremony keagaamaan celebrate Hari Raya Puasa and Hari Raya Qurban.
The skull cap worn by soldiers and police of Malaysia and Brunei in certain ceremonies.
On June 19, 2008, DAP assemblymen Gwee Tong Hiang removed from Johor hall for not complying with dress codes formals and skull cap.
Source : http://ms.wikipedia.org/wiki/Songkok