The 27th of Rajab (the 7th month of the Islamic calendar) commemorates the night of Prophet Muhammad's ascent to heaven, also called Israk Mikraj in Singapore. According to tradition, Prophet Muhammad rode to heaven on a winged horse known as a buraq. It flew from Mecca to Jerusalem, then carried the Prophet through the seven levels of heaven where he met some earlier prophets of Islam, and brought him home before the night was over. After this momentous night, the five daily prayers were established.
To honour this event, special lectures or sermons are held at mosques on this day, as well as readings from the Qur'an, especially from Surat al-Isra' - the chapter on the Night Journey.