Sundanese religion is syncretic, mixing pre-Islamic and pre-Indian beliefs and practices with Islamic ones. Although the Sundanese have been Muslim for a long time, it is only since World War II that Islam has been taught. The 1ebbe, who teaches Islam, also records births and deaths in the official records. As a result of this instruction, many practices and beliefs that predated the introduction of Islam are being altered. Non-Islamic spirits are being given Islamic identities and meanings; for example, ceremonial visits to the graves of ancestors (a central, but non-Islamic, feature of Sundanese religion) and the ritual cleaning of weapons are being incorporated into Islamic celebrations such as Maulud.