Question 1

What timezone is Philadelphia, United States in?

Accepted Answer

Philadelphia is in the Eastern Standard Time timezone, commonly abbreviated as EST. The current UTC offset is UTC-4, which means Philadelphia is behind Coordinated Universal Time by 4 hours. Note that this offset changes during daylight saving time, when the abbreviation switches to EDT.

Question 2

What is the UTC offset for Philadelphia?

Accepted Answer

Philadelphia has a UTC offset of UTC-4, which is based on the IANA timezone identifier America/New_York. During daylight saving time, the offset changes by one hour. This means Philadelphia effectively operates at two different UTC offsets throughout the year, which is important to account for when scheduling international calls or meetings.

Question 3

Does Philadelphia observe daylight saving time (DST)?

Accepted Answer

Yes, Philadelphia observes daylight saving time. During DST, clocks move forward by one hour and the timezone abbreviation changes from EST to EDT. This typically happens in spring ("spring forward") and reverses in autumn ("fall back"). The transition can temporarily affect time differences with cities that do not observe DST or that switch on different dates. Check our DST change calendar for exact transition dates.

Question 4

What is the time difference between Philadelphia and New York?

Accepted Answer

Philadelphia is in the same timezone as New York (Eastern Time), so there is no time difference. When it's 9:00 AM in New York, it's also 9:00 AM in Philadelphia. Both cities follow the same DST schedule, so this alignment holds year-round.

Question 5

What is the time difference between Philadelphia and London?

Accepted Answer

Philadelphia is 5 hours behind London (GMT). When it's 12:00 PM in London, it's 7:00 AM in Philadelphia. Both cities observe daylight saving time, so the difference may temporarily shift if they transition on different dates. London uses Greenwich Mean Time (GMT) in winter and British Summer Time (BST) in summer.

Question 6

What country is Philadelphia in?

Accepted Answer

Philadelphia is located in United States. It uses the Eastern Standard Time timezone with an abbreviation of EST and a current UTC offset of UTC-4. Philadelphia observes daylight saving time, so clocks shift by one hour seasonally. You can view the current local time, sunrise and sunset times, and nearby cities on our dedicated Philadelphia time page.

Question 7

What are the coordinates of Philadelphia?

Accepted Answer

Philadelphia is located at latitude 39.95°N, longitude 75.17°W. These coordinates are used to calculate accurate sunrise and sunset times using the SunCalc astronomical library. The latitude determines how much daylight variation Philadelphia experiences across seasons, while the longitude affects the exact clock time of sunrise and sunset within the timezone.

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