What Time Zone Is Shīrvān In?
Shīrvān operates on Asia/Tehran, abbreviated as GMT+3:30, which is currently UTC+03:30 from Coordinated Universal Time. The IANA Time Zone Database (also known as the tz database or zoneinfo) records this under the identifier Asia/Tehran. That identifier is what your phone, laptop, and every major web service uses when they display a localized time for Shīrvān.
The designation Asia/Tehran follows the IANA convention of naming zones after the largest city in that timezone region. This naming is geographic, not political, it reflects where the zone is observed, not which government controls it. The full record for this zone, including historical UTC offsets and past DST rule changes, is publicly available in the Wikipedia list of tz database time zones.
UTC Offset: Shīrvān vs. The World
The current UTC offset in Shīrvān is UTC+03:30. This means Shīrvān time is 03:30 hours ahead of Coordinated Universal Time. To quickly convert: if it's 12:00 UTC right now, it's 08:50 local time in Shīrvān.
Relative to other major cities: Shīrvān is 9 hours ahead of New York, and 4 hours ahead of London (including any DST difference currently in effect). These differences can shift by one hour during DST transitions, which occur on different dates in different regions.
Business Hours in Shīrvān
Standard business hours in Shīrvān run from 09:00 to 18:00 local time (Asia/Tehran). In UTC, that window is 05:50 to 14:50 UTC. If you're trying to schedule a call with someone in Shīrvān:
- From New York: the Shīrvān business day runs 00:50 to 09:50 New York time.
- From London: the Shīrvān business day runs 05:50 to 14:50 London time.
Use the hour-by-hour conversion table above for the full 24-hour breakdown.
Daylight Saving Time in Shīrvān
The DST indicator above shows whether Shīrvān currently observes Daylight Saving Time. When DST is active, clocks advance by one hour, shifting the UTC offset by +1 and changing the abbreviation (for example, from EST to EDT in New York). When DST ends, clocks fall back and the offset returns to its standard value.
Not all countries observe DST. Japan, China, India, most of Africa, and several other nations maintain a fixed offset year-round. Whether Asia/Tehran observes DST, and the exact dates of transitions, is governed by the rules stored in the IANA Time Zone Database , the same source your phone uses. The Wikipedia article on Daylight Saving Time provides a global map and country-by-country breakdown of DST observance.
Sunrise and Sunset in Shīrvān
Today in Shīrvān (37.4°N, 57.9°E), sunrise is approximately 06:38 and sunset is approximately 18:02 local time (Asia/Tehran). These times are calculated using the Spencer equation for solar declination and apply to today's date. Latitude significantly affects day length: cities near the equator see roughly 12 hours of daylight year-round, while high-latitude cities experience dramatic swings, midsummer days can exceed 20 hours near the Arctic Circle, while midwinter days shrink to under 4 hours. At 37.4° latitude, Shīrvān's day length varies by several hours between summer and winter solstice.
Best Time to Call Shīrvān from Abroad
Standard business hours in Shīrvān run 09:00 to 18:00 local time (Asia/Tehran). For international callers, the ideal window is 10:00 to 16:00 Shīrvān time : after the morning rush and before the end-of-day slowdown. In UTC, this translates to 06:50 to 12:50 UTC. Avoid calling before 09:00 or after 20:00 Shīrvān time, these windows fall outside acceptable business etiquette in most professional settings. If you are calling from New York,Shīrvān business hours correspond to 00:50 to 09:50 Eastern time. From London, that same window is 05:50 to 14:50 GMT/BST.
Shīrvān Time vs Major World Cities
Right now, Shīrvān (UTC+03:30) is offset from major business hubs as follows:
- New York: Shīrvān is 8.5 hours ahead of New York right now (UTC-05:00).
- London: Shīrvān is 3.5 hours ahead of London right now (UTC+00:00).
- Dubai: Shīrvān is 0.5 hours behind Dubai right now (UTC+04:00).
- Singapore: Shīrvān is 4.5 hours behind Singapore right now (UTC+08:00).
- Tokyo: Shīrvān is 5.5 hours behind Tokyo right now (UTC+09:00).
- Sydney: Shīrvān is 7.5 hours behind Sydney right now (UTC+11:00).
These differences shift by one hour during DST transitions, which occur on different dates in different regions. Always verify the current offset before scheduling.
Geographic Location of Shīrvān
Shīrvān sits at 37.3967°N, 57.9295°E. Solar noon, the moment the sun reaches its highest point, occurs at approximately 11:20 local time, when the sun crosses the meridian above Shīrvān. The IANA timezone Asia/Tehran groups Shīrvān with nearby cities that share the same legal time, even if they sit at slightly different longitudes and therefore experience solar noon at slightly different moments. Zone boundaries are drawn along political borders and transportation corridors, not strict meridian lines.
Shīrvān: Size, Population, and Location
Shīrvān has a population of approximately 82,790 people, placing it among smaller but notable cities. The city sits at 37°23'N, 57°55'E (decimal: 37.3967°, 57.9295°),37.4 degrees north of the equator.
At 37.4° latitude, Shīrvān experiences moderate seasonal variation in day length, expect roughly 9-10 hours of daylight in winter and 14-16 hours in summer. Today, Shīrvān sees sunrise at 06:38 and sunset at 18:02 local time. The IANA timezone Asia/Tehran groups Shīrvān with nearby cities that share the same legal clock, even if they sit at slightly different longitudes with marginally different solar noon times.
Working Hours Overlap: Shīrvān and Key Partners
Shīrvān's standard working day (09:00–18:00 local, Asia/Tehran) translates to different hours for common international partners:
- San Francisco (America/Los_Angeles): Shīrvān's workday runs 21:50 to 06:50 Pacific time.
- Berlin (Europe/Berlin): Shīrvān's workday runs 06:50 to 15:50 Central European time.
Overlap windows, times when both cities are within 09:00–18:00, are the practical window for real-time collaboration. Use the time difference tool on this site to find the shared working window for any pair of cities.