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North Sumatra, Indonesia

North Sumatra follows Western Indonesia Time, or WIB, at UTC+7. This offset applies across the province all year because Indonesia does not use seasonal clock changes in North Sumatra.

Medan, Indonesia

Friday, 4 September 2026

UTC+7 · Asia/Jakarta

Time and sun data for Medan — the largest city of North Sumatra

The sun in Medan

Sunrise 06:21 Solar noon 12:26 Sunset 18:31 Daylight 12 h 10 min Night 11 h 50 min Civil twilight 06:00 – 18:52

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Current time in North Sumatra, Indonesia

One official time covers North Sumatra’s mainland districts, cities, and offshore islands. Medan, the Lake Toba area, and Nias therefore share the same clock, even though sunrise is not seen at precisely the same moment in each place.

To convert local time to Coordinated Universal Time, subtract seven hours. For international calls, remember that North Sumatra’s offset remains fixed while countries using daylight saving time may alter theirs. The gap between Medan and such destinations can consequently change during the year.

North Sumatra has volcanoes, islands, and a vast lake, but fortunately only one official clock to consult.

Urban centers across the province

Medan is by far the province’s leading urban center and a major gateway to western Indonesia. Nearby Binjai forms part of the broader metropolitan area. Pematangsiantar is an important inland city, while Tebing Tinggi occupies a strategic position on routes across the eastern side of the province.

Use Medan time for flights, offices, and appointments in the provincial capital. Keep the same time when traveling to Binjai or Pematangsiantar. Apply WIB to Tebing Tinggi, Padangsidimpuan, Sibolga, and other provincial cities.

Do not change your watch when continuing to Lake Toba or the Nias islands. The uniform zone is especially convenient on overland journeys. Road duration and departure schedules can be read directly without adding or subtracting an hour at an internal provincial boundary.

Reading sunrise times correctly

Sunrise varies with longitude, date, elevation, and the visible horizon. Communities on the eastern side of North Sumatra generally meet the morning light before locations farther west. On Nias, sunrise occurs later by the clock than at comparable mainland locations because the islands lie farther west.

The province’s nearness to the equator keeps seasonal swings in daylight relatively modest. That does not make sunrise identical every day. Small daily changes accumulate, and the earliest visible sunlight may be delayed by hills, mountains, cloud, or dense urban surroundings.

Choose a city-specific forecast or solar calendar when planning photography, fishing, trekking, or a road departure before dawn. A listing for Medan is useful for the capital but should not be treated as an exact value for Sibolga, Nias, or settlements around Lake Toba.

Questions and answers
What does WIB mean in North Sumatra?
WIB means Western Indonesia Time. In North Sumatra it is seven hours ahead of Coordinated Universal Time.
Do Medan and Lake Toba have the same time?
Yes. Both use WIB, as do all other locations within North Sumatra.
Why can the time difference from Europe or North America change?
North Sumatra stays on UTC+7, but many overseas locations change their clocks for daylight saving time.

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