Why Prayer Times Change Through the Year

The Sun and the clock do different jobs

Prayer times change through the year because the Sun’s apparent daily path changes, while a timetable also translates calculations into a local clock. A date change can therefore produce a different set of times even when your city and calculation method stay the same.

The US Naval Observatory explains that the Sun follows a higher, longer path in northern summer and a lower, shorter one in northern winter. It also explains why solar time and uniform clock time do not remain perfectly aligned. Sunrise and sunset do not move as a simple, identical number of minutes every day.

A London example with the settings kept visible

These results use AL-Naqawa’s unchanged calculation engine for London, United Kingdom: 51.50853° N, 0.12574° W, altitude 25 metres, Europe/London. The method is Muslim World League, with Standard Asr, automatic high-latitude handling, Ramadan mode off and zero manual minute adjustments.

The table uses local 24-hour time. January and October use UTC+00:00; June uses UTC+01:00. The comparison includes both seasonal geometry and the local daylight-saving clock offset. It is not a measurement of seasonal change with the clock offset held fixed.

What to look for in the pattern

In this example June’s Maghrib is much later on the local clock than January’s, and the morning entries move earlier. Fajr is a separate twilight calculation from Sunrise. At London’s latitude, summer twilight can also involve the selected high-latitude handling; the displayed results reflect the Automatic option.

A method’s twilight angles, the Asr setting and manual adjustments still matter. Keep them visible when comparing months. These calculated start times do not establish a mosque’s Iqamah or determine which religious convention a community should follow.

Plan one month at a time

A useful habit is to review the coming month before arranging regular commitments. Save the city, date range and settings with any exported or printed copy, then check the current timetable when plans change.

• Choose the city where you will actually be, rather than relying on your device’s home location.
• Check the month and local time zone before comparing rows.
• Leave room for travel and preparation instead of treating a calculated start time as a venue booking.
• Confirm congregation times separately with the mosque you intend to attend.