The sun and the clock in Thimphu (2026)
Thimphu lies at 89.6°E. Its time zone, UTC+6, is built around the 90°E meridian. The two very nearly coincide: solar noon — the moment the sun is highest — falls at about 12:01, which is as close to true solar time as a zone this wide can get. The zone holds UTC+6 all year — there is no daylight saving here.
The longest day of 2026 is 22 June, with 13h 53m of daylight. The shortest is 22 December, with 10h 24m. The swing between them is 3h 28m. At this latitude the seasons are visible in the clock, but never dramatic.
The earliest sunrise and the latest sunset do not land on the longest day. In Thimphu the sun comes up earliest on 11 June at 05:05, while the latest sunset waits until 3 July at 19:01. The equation of time is what separates them: the Earth's elliptical orbit and axial tilt move solar noon back and forth by several minutes over the year.
The sky stays usably light for a while after the sun goes down. In Thimphu that civil twilight runs about 23 minutes at the equinox.
Every figure in this section is computed from the city's own latitude, longitude and IANA time zone using NOAA solar algorithms (Spencer, 1971), accurate to about ±2 arcminutes below 65° latitude.