Recommendation of practice looking for the Hilal Crescent for each of the 12 Islamic Months which will make the sighting of it for The Months of Ramadan and Shawwal a part of a standard mode of operation.
Hilal is an Arabic term, first developed in pre-Islamic Arabia, meaning crescent moon–specifically, the very slight crescent moon that is first visible after a new moon. Muslims look for the hilal when determining the beginning and end of Islamic months, but do not worship it. The need to determine the precise time of the appearance of the hilal was one of the inducements for Muslim scholars to study astronomy.
The Quran says: “And from among His Signs are the night and the day, and the sun and the moon. Prostrate not to the sun nor to the moon, but prostrate to Allah Who created them, if you (really) worship Him.” (Fussilat:37). In another verse, “They ask you, [OMuhammad], about the new moons. Say, ‘They are measurements of time for the people and for Hajj.’” (al-Baqarah:189)
Indeed, the number of months with Allah is twelve [lunar] months in the register of Allah [from] the day He created the heavens and the earth; of these, four are sacred. That is the upright religion, so do not wrong yourselves during them. And fight against the ones practicing partnership (with Allah) collectively as they fight against you collectively. And know that Allah is with the those practicing Regardfulness.
It is He who made the sun a shining light and the moon a derived light and determined for it phases – that you may know the number of years and account [of time]. Allah has not created this except in truth. He details the signs for a people who know
The sun and the moon with a precise accounting