Families break their Ramadan fast in front of the Blue Mosque on April 13, 2021, in Istanbul, Turkey. Getty Images
As the Islamic holy month of Ramadan approaches, nearly a quarter of the world's population prepares to observe this sacred time. Known for its dawn-to-dusk fasting, Ramadan is a period of spiritual reflection, self-discipline, and community bonding.
However, what many outside the faith might not realize is that while Muslims anticipate its arrival, the exact start date often remains uncertain until just hours before. The reason? It all comes down to the sighting of the new crescent moon.
Why the Start of Ramadan Varies
Unlike the fixed dates of the Gregorian calendar, the Islamic calendar follows the lunar cycle. This means Ramadan begins when the waxing crescent moon becomes visible. However, this sighting can differ across countries—and sometimes even within the same city.
For instance, in Saudi Arabia, where Islam was first established, Ramadan is expected to start on the evening of March 1, 2025. Meanwhile, in Indonesia, the moon’s visibility will likely push the beginning to March 2. This one-day variation is not uncommon; in 2024, Saudi Arabia and Oman started Ramadan on different days.
But why does this happen? According to Professor Scott Kugle of Emory University, multiple factors influence the start date, including:
- Astronomical calculations and physical moon sightings
- Geographic location and time zones
- Religious traditions and interpretations
- Local weather conditions affecting visibility
No Central Authority, Local Decisions
One of the key reasons for the differences in start dates is the decentralized nature of Islamic religious practice. There is no single global authority dictating when Ramadan begins. Instead, it depends on local moon-sighting committees, mosque leadership, and even family traditions.
Professor Kugle explains that some Muslims rely on direct observation of the crescent moon. Designated observers climb to high vantage points or open areas to confirm its sighting. If they don’t see it, Ramadan is delayed by a day. Others, like those in Turkey, use astronomical calculations to determine the start date in advance. Both methods are widely accepted in Islamic teachings.
Additionally, different sects within Islam, such as Sunnis and Shias, may observe Ramadan on different days due to variations in their religious interpretations. Sometimes, even a sense of community pride leads groups to follow distinct fasting schedules.
Worshippers pray on April 21, 2023, around the Kaaba at the Masjid al-Haram mosque in the holy city of Mecca, Saudi Arabia, on the first day of Eid al-Fitr, which marks the end of the holy fasting month of Ramadan. Getty Images
The Role of Geography and Time Zones
The planet’s vast geography also plays a significant role. The moon’s position at sunset varies greatly from Indonesia to Saudi Arabia to North America. With Muslims spread across 24 time zones, their Ramadan experience is shaped by their location.
Interestingly, while latitude doesn’t affect when Ramadan starts, it significantly impacts fasting durations. Near the equator, fasting hours remain relatively stable year-round. However, in places like Scandinavia, where summer days are extremely long, fasting can last up to 20 hours. Some Muslim communities in such regions follow Mecca’s timings instead to maintain a manageable fast.
Zahoor Akbar, originally from Pakistan, offers Ramadan prayers at his home in Miramar, Florida, on May 2, 2021. Getty Images
Ramadan- A Time for Reflection and Unity
Despite the variations in start dates and fasting hours, Ramadan remains a unifying force for Muslims worldwide. The anticipation, the special foods, and the communal spirit make this period deeply cherished.
“It’s a time that shakes up daily routines,” Kugle says. “No morning coffee, no lunch meetings—it shifts your focus inward.”
Whether beginning on different days or fasting for varying hours, the essence of Ramadan remains the same: spiritual renewal, self-discipline, and a shared sense of purpose across the global Muslim community.
