 "At-Tarikh Salasilah Negeri Kedah" described the conversion to Islamic faith was started in 1136 AD.However, historian Richard Winstedt, quoting an Acehnese account, gave a date of 1474 for the year of conversion to Islam by the ruler of Kedah.This later date accords with an account in the "Malay Annals" where a raja of Kedah visited Malacca during the reign of its last sultan seeking the honour of the royal band that marks the sovereignty of Malacca Empire on a Muslim ruler.