The scholars of the UK and Europe, Hilal Forum, proposed the criteria in 2021 , According to the perspectives of the Hanafi, Maliki, and Hanbali Jurists, the timing disparities around the world do not impact the sighting of the moon, except in cases where excessive distance results in a time variance exceeding 12 hours. Consequently, this discrepancy may lead to a divergence between the dates of observation during recognised day and night. Hence, in regions spanning Asia, Europe, Africa, and America, the sighting of the crescent by any day observatory will be deemed valid.

In the United Kingdom, adherence is to the British observatory, which applies a six-tier visibility classification system denoted by letters A through F. Tiers A to C typically signify the commencement of a new Islamic month on the subsequent day. The UK and Europe Hilal Forum, guided by these observatory assessments, will proactively announce the dates of crescent sightings, ensuring that precise announcements are issued a year in advance. Furthermore, it is reiterated that the representatives of the UK and Europe Hilal Forum will consistently announce the advent of new lunar months and sighting of the Hilal each month.

• The scholars of the UK & Europe Hilal Forum have announced that, starting from June 2025 (1447 AH), moon sighting announcements will be based on the crescent visibility criteria adopted by the Turkish Ministry of Religious Affairs (Diyanet).

It is adopted that the first sight of the crescent is possible when the moon's elongation (separation angle ) is 8 degree and the moon's altitude is 5 degree when the sun sets

There are two criteria to be achieved when sighting a crescent. The criteria are as follows: the altitude of the moon is 5 degrees when the sun sets, and the elongation or seperation angle is 8 degrees. If either criteria are not met, it will not be possible to see the first crescent with the naked eye.

The conjunction time must be before Fajr time in Australia and New Zealand when a crescent is seen according to Greenwich time.

Any crescent must also be visible from lands in the American Continent when it appears.