Why Ramadan Iftar Times Change Daily: Earth’s Orbit & More

Many people notice a subtle shift in the timing of iftar, the evening meal that breaks the daily fast during Ramadan. This isn’t a matter of misremembering or calendar errors, but a predictable consequence of Earth’s movements and its relationship to the sun. Understanding why the time to break the fast changes daily and even significantly from year to year, requires a look at some fundamental astronomical principles.

The changing time of iftar is directly linked to the position of the sun as it sets, which is influenced by the Earth’s rotation and orbit. While the difference might be just a few minutes each day, these small changes accumulate over the month of Ramadan, potentially shifting the breaking of the fast by more than 10 minutes compared to the beginning of the month. This isn’t a deviation from a fixed schedule, but a natural reflection of our planet’s place in the solar system.

Earth’s Movements and the Sun’s Position

Earth is in constant motion, rotating on its axis while simultaneously orbiting the sun in an elliptical path. This dual movement means the sun’s apparent position from our perspective is always changing. As Earth rotates, the horizon gradually obscures the sun, resulting in sunset. Yet, the exact moment of sunset varies slightly each day due to these ongoing movements. As explained by IDN Times, this seemingly minor difference adds up over the course of a month.

It’s important to note that these shifts aren’t related to weather conditions or time zone adjustments; they are a direct result of Earth’s position within the solar system.

Geographical Variations and Local Conditions

The time of sunset isn’t uniform across the globe. Geographical factors like latitude, longitude, and altitude all play a role. Cities at higher elevations, for example, typically experience sunset later than those in valleys or areas obscured by mountains.

This explains why iftar times can vary slightly even within the same time zone. While a single time zone provides a general framework, the precise moment the sun dips below the horizon differs based on local topography.

The Tilt of Earth’s Axis and Day Length

Earth’s axis is tilted at approximately 23.5 degrees relative to its orbital plane. This tilt causes the sun to appear higher or lower in the sky throughout the year, influencing the length of daylight hours. When the sun is higher, days are longer, and sunset occurs later. Conversely, when the sun is lower, days are shorter, and sunset happens earlier.

As Ramadan progresses, and depending on the time of year it falls, the sun’s position may shift, leading to a gradual advancement of iftar times. This isn’t due to a change in the calendar, but a natural consequence of the Earth’s axial tilt and its effect on daylight duration.

Earth’s Elliptical Orbit and Variable Speed

Earth’s orbit around the sun isn’t a perfect circle; it’s an ellipse. So the distance between Earth and the sun varies throughout the year. When Earth is closer to the sun, it moves faster in its orbit, and when it’s farther away, it moves slower.

This variation in speed similarly contributes to slight shifts in the timing of sunset. While the effect isn’t immediately noticeable on a daily basis, it becomes apparent over several weeks during Ramadan.

The Islamic Calendar and Seasonal Shifts

The Islamic calendar, or Hijri calendar, is based on the lunar cycle, unlike the Gregorian calendar which is based on the solar cycle. Ramadan shifts approximately 10-11 days earlier each year in relation to the Gregorian calendar. This means Ramadan falls during different seasons over time.

the duration of daylight hours during Ramadan varies from year to year. If Ramadan occurs during a season with longer days, iftar will be later. Conversely, if it falls during a season with shorter days, iftar will be earlier. This contributes to the perception that iftar times change significantly from one year to the next.

Understanding the Factors at Play

1. The changing time of iftar is a result of Earth’s continuous movement relative to the sun.
2. Sunset times vary based on geographical location and altitude.
3. Earth’s axial tilt affects the length of daylight hours throughout the year.
4. Earth’s elliptical orbit causes variations in its orbital speed.
5. The lunar-based Islamic calendar causes Ramadan to shift through the seasons.

Recognizing these factors helps to understand why iftar times aren’t fixed and why they change daily. This isn’t an inconsistency, but a demonstration of the complex dynamics of our universe and the interconnectedness of human activities with celestial movements.

In 2024, a penumbral lunar eclipse occurred on the 15th of Ramadan, and a total solar eclipse occurred on the 29th of Ramadan in 2023. Researchers at Universitas Pendidikan Indonesia even conducted an expedition to observe the 2023 solar eclipse from Biak Island in Papua. These celestial events, occurring during a time of spiritual observance, highlight the ongoing interplay between the earthly and cosmic realms. A partial solar eclipse can occur several times a year, where the moon only partially covers the sun, appearing as a crescent shape. As reported by Kompas.com, two eclipses are expected to occur during Ramadan in 2025.

As Ramadan approaches each year, understanding the astronomical factors influencing iftar times can provide a deeper appreciation for the natural rhythms that govern our world and the traditions that connect us to them. For accurate and localized iftar times, it’s always best to consult reliable sources that account for specific geographical coordinates and astronomical calculations.