2026-09-08
Prayer Times Across American Cities: How Much Does Location Matter?
The United States spans four time zones in the lower forty-eight and six in total. Within a single time zone, the sun can arrive more than an hour apart from one edge to the other. That means a prayer timetable printed for a city a few hundred miles away can be badly wrong — and because the clock time looks familiar, the error is easy to miss.
Longitude moves everything evenly
One degree of longitude equals four minutes of solar time. The Eastern time zone stretches from about 67 degrees west in Maine to about 90 degrees west at its far edge — roughly 23 degrees, or an hour and a half of real sun time, all sharing one clock. Boston and Detroit are both on Eastern time, but sunrise in Detroit arrives around forty minutes later. Every prayer of the day shifts by the same amount.
Latitude spreads times unevenly
Latitude works differently. It does not shift all times equally; it stretches them apart depending on the season. In June, Minneapolis at 45 degrees north has a much longer day than Houston at 29.8 degrees, so Fajr and Isha sit far apart there and much closer together in Texas. In March and September, when day and night are near equal everywhere, the difference nearly vanishes.
The practical rule
Use the table for your own city, not the nearest big one. The difference between two cities in the same state is often larger than the difference between two calculation methods — which means picking the right location matters more than picking the right method.
Within a metro area, relax
Inside a single metropolitan area the difference is small. Across the width of New York City you have less than half a degree of longitude, or about two minutes — smaller than the precaution margin most timetables build in anyway. A city-wide table is perfectly adequate; you do not need a neighbourhood-level one.
Where the northern cities differ
In the northern tier — Seattle at 47.6 degrees, Minneapolis at 45, Boston at 42.4 — summer nights get short enough that Isha runs late and Fajr comes early. Anchorage, far above that, is a different problem entirely. Below about 40 degrees the effect is mild all year. If you have moved north and your prayer schedule suddenly feels compressed in June, this is why.
Checking your own table
Two quick sanity checks. First, Dhuhr should fall close to the midpoint between sunrise and sunset — if it does not, the longitude or time zone is wrong. Second, sunrise on your table should match what you actually see out of the window within a couple of minutes. If both hold, the table is for the right place.