UNS Report
Astronomical Data: Scientific Parameters and Visibility Standards.Astronomical calculations indicate that the new moon (central conjunction) occurred at 12:01 PM UTC on 17 February. Accordingly, the moon’s age at sunset in most Arab countries was no more than three to four hours.
Experts in lunar astronomy widely agree that a crescent younger than 15 to 18 hours is, under normal atmospheric conditions, virtually impossible to observe—whether with the naked eye or through telescopic assistance. The crescent’s close angular proximity to the sun and the minimal illumination of its surface significantly reduce visibility.
Moreover, observational data show that in several locations the moon set either simultaneously with or prior to sunset. From a purely astronomical perspective, this eliminates any realistic prospect of sighting. In , for instance, the moon’s setting closely coincided with sunset, rendering visibility scientifically implausible according to internationally recognized criteria.
Divergent National Methodologies
Despite the clarity of the astronomical indicators, approaches to crescent verification differ among Islamic nations. Countries including , , , , and declared that 18 February corresponded to the 29th of Sha‘ban in their calendars, thereby granting the crescent additional time to mature and increasing the likelihood of sighting.
Astronomical projections suggested improved observational conditions on the evening of 18 February in major cities such as , , , , , , and , where the moon was expected to set between 40 and 73 minutes after sunset. Such intervals substantially enhance the probability of visibility, contingent upon clear atmospheric conditions.
Science and Jurisprudence: An Ongoing Dialogue
A growing body of contemporary astronomers and Islamic jurists recognize a central principle: when it is scientifically established that the moon sets before or concurrently with the sun, attempts at observation are effectively futile. Regional astronomical conferences have echoed this position, advising against initiating sighting efforts when conclusive calculations confirm the crescent’s absence above the horizon at sunset.
Nonetheless, several countries continue to rely primarily on authenticated visual testimony, even under challenging astronomical circumstances. This methodological divergence remains the principal cause of recurring discrepancies in the declaration of Ramadan’s commencement across jurisdictions.
Egypt’s Position in Perspective
Based on the calculations for 17 February, the announcement that the crescent could not be sighted that evening appears consistent with established astronomical standards. Commencing Ramadan on Thursday—on the basis of calculations granting the crescent sufficient age and altitude for visibility—accords with scientific parameters.
However, the determination of the lunar month’s beginning extends beyond astronomical modeling. It is also governed by jurisprudential interpretation and nationally defined procedures, which differ among states, including and . These variations make annual differences in the start of Ramadan an enduring feature of the Islamic calendar.
Broader Implications
The events surrounding Ramadan 2026 underscore several key realities:
The crescent on 17 February did not satisfy recognized astronomical visibility criteria.
Deferring observation to 18 February significantly improved the prospects for sighting in multiple regions.
The disagreement highlights a continuing divergence between reliance on empirical astronomical calculations and adherence to traditional visual verification.
The absence of a unified institutional framework integrating scientific data with religious adjudication sustains the annual debate.
Conclusion
Scientific evidence strongly indicates that sighting the crescent on the evening of 17 February was highly improbable across most Arab countries. Yet the formal declaration of Ramadan’s commencement remains both a sovereign and religious decision, shaped by each nation’s jurisprudential framework and institutional practice.
