The new Lunar (Hijric) month begins on the next day of sighting the new crescent at west after sunset i.e. during twilight at dusk. One major issue that has affected Islamic new moon visibility for many years is misdirected, excessive and obtrusive artificial light (Odeh, 2004; Shariff, 2005).
This study investigates how sky limiting magnitude influences the visibility of Islamic new moon. Other than the determination of time, Islamic calendar (taqwim Hijri) was formed to meet the needs of worship. One of the features is determination of the first day of months based on visibility of Islamic new moon (hilal) i.e. sightings of the first sliver of the waxing moon marking the start of each month (Zainal, 2002).