Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

Philippines to Tehran

-4h 30m

Philippines

PHTSOURCE

UTC+08:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Tehran

IRST

Iran · UTC+03:30

HH07

MM30

07:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Philippines

Tehran

12:00 AM

7:30 PM-1

2:00 AM

9:30 PM-1

4:00 AM

11:30 PM-1

6:00 AM

1:30 AM

8:00 AM

3:30 AM

10:00 AM

5:30 AM

12:00 PM

7:30 AM

2:00 PM

9:30 AM

4:00 PM

11:30 AM

6:00 PM

1:30 PM

8:00 PM

3:30 PM

10:00 PM

5:30 PM

Green rows indicate typical business hours (9 AM - 5 PM)

PHT and IRST on the World Map

The map below highlights the PHT (Philippine Time) and IRST (Iran Standard Time) timezone regions across the globe.

PHT Zone

→

IRST Zone

Explore all world timezones interactively →

PHT – Philippine Time

UTC+08:00

Philippine Time (PHT, UTC+08:00) is the time zone for the Philippines, 8 hours ahead of UTC.

Countries in PHT

Philippines

Major Cities in PHT

ManilaQuezon CityDavao CityCebu CityZamboanga

Key Facts about PHT

•Philippine Time does not observe daylight saving, so UTC+08:00 is fixed all year.
•PHT shares its offset with China, Hong Kong, Singapore and Malaysia.
•Manila is one of the largest outsourcing hubs in the world.
•The Philippines spans one time zone despite being an archipelago of over 7,600 islands.

Daylight Saving:No – UTC+08:00 year-round

Learn more about PHT on Wikipedia

IRST – Iran Standard Time

UTC+03:30

Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.

Countries in IRST

Iran

Major Cities in IRST

TehranIsfahanMashhadTabrizShirazKaraj

Key Facts about IRST

•IRST is one of only a few time zones with a 30-minute offset.
•Iran observes daylight saving time, switching to IRDT (UTC+04:30).
•Tehran has a metropolitan population of over 16 million.

Daylight Saving:Yes – switches to IRDT

Learn more about IRST on Wikipedia

About Tehran

Wikipedia

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.

Population:9.4 million

Metro:16.8 million

Business Hours:8:00 AM - 4:00 PM IRST

Currency:IRR (﷼)

Stock Exchange:TSE (Tehran Stock Exchange)

Key Landmarks

Azadi TowerGolestan PalaceGrand BazaarMilad TowerTabiat Bridge

Did You Know?

Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).

Learn more about IRST timezone →

Everything You Need to Know About Philippines and Tehran Time

Philippines runs on Philippine Standard Time (PHT) at UTC+08:00. Tehran runs on Iran Standard Time (IRST) at UTC+03:30. That puts Philippines 4 hours 30 minutes behind Tehran — a difference of -4h 30m at the current offsets.

In practice, when it is 9:00 AM in Philippines it is 4:30 AM in Tehran. Midnight in Philippines is 7:30 PM in Tehran. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Philippines to Tehran time conversion table

Philippines (PHT)	Tehran (IRST)	Day
12:00 AM	7:30 PM	previous day
6:00 AM	1:30 AM	same day
7:00 AM	2:30 AM	same day
8:00 AM	3:30 AM	same day
9:00 AM	4:30 AM	same day
12:00 PM	7:30 AM	same day
3:00 PM	10:30 AM	same day
5:00 PM	12:30 PM	same day
6:00 PM	1:30 PM	same day
9:00 PM	4:30 PM	same day

Why people convert Philippines to Tehran time

Scheduling a call from Philippines to Tehran: a 10:00 AM start in Philippines lands at 5:30 AM in Tehran, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Philippines and Tehran are inside the 9-to-5 working day between 1:30 PM and 5:00 PM PHT time (9:00 AM–12:30 PM IRST). That is roughly 3 hours 30 minutes of usable overlap.
Watching a live event or market open: Philippines viewers need 4:30 AM in Tehran to catch a 9:00 AM start there, and 4:30 AM if the event is anchored to Philippines.

Always state the zone abbreviation, not just the hour. "3:00 PM PHT" is unambiguous; "3 PM" across a -4h 30m gap is not.
Block 1:30 PM–5:00 PM PHT as the recurring meeting window if you work primarily from Philippines and need Tehran colleagues present.

About PHT (Philippine Time)

Philippine Time (PHT) is fixed at UTC+08:00 all year. The Philippines has not observed daylight saving time since 1978, apart from a brief trial in 1990. PHT shares its offset with China Standard Time, Hong Kong Time, Singapore Time, Malaysian Time and Australian Western Standard Time, which makes Manila a convenient bridge for scheduling across East and Southeast Asia. As one of the world's largest centres for business process outsourcing, Manila keeps overlapping hours with both Australia and, on early shifts, the United States, and its contact-centre schedules are usually planned around Manila local time.

About IRST (Iran Standard Time)

Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.

Best time to call between Philippines and Tehran

Both Philippines and Tehran sit inside the 9 AM – 5 PM working day between 1:30 PM–5:00 PM PHT, which is 9:00 AM–12:30 PM IRST. That gives roughly 3 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

Philippines and Tehran overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.

Philippines is 4 hours 30 minutes behind Tehran (PHT UTC+08:00 → IRST UTC+03:30). The shared working window is 1:30 PM–5:00 PM PHT. Remember to re-check around daylight-saving transitions.

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Philippines and Tehran?

Philippines (PHT, UTC+08:00) is 4 hours 30 minutes behind Tehran (IRST, UTC+03:30). The gap is currently -4h 30m.

How do I convert Philippines time to Tehran time?

Add -4h 30m to Philippines local time. For example, 9:00 AM in Philippines is 4:30 AM in Tehran.

What time is it in Tehran right now?

Tehran uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -4h 30m offset from Philippines.

What is the best time to call Tehran from Philippines?

Call between 1:30 PM and 5:00 PM PHT — that maps to 9:00 AM–12:30 PM IRST and keeps both parties inside the working day.

Which is behind, Philippines or Tehran?

Philippines is 4 hours 30 minutes behind Tehran. When it is 12:00 PM in Philippines it is 7:30 AM in Tehran.

Do Philippines and Tehran use different time zones?

Philippines (Philippines) uses PHT at UTC+08:00, while Tehran (Iran) uses IRST at UTC+03:30. The IANA identifiers are Asia/Manila and Asia/Tehran.

Does daylight saving time affect the Philippines–Tehran difference?

Neither zone observes daylight saving time, so the -4h 30m offset between Philippines and Tehran is fixed all year.

Which other cities share Philippines's time zone?

PHT also covers Manila, Quezon City, Davao City, Cebu City, Zamboanga.

Which countries use PHT, Philippines's zone?

PHT is used in Philippines.

Is there a day difference between Philippines and Tehran?

Not normally. The -4h 30m gap only pushes the date over the previous day.

What is the time difference between Philippines and Tehran?

Tehran is -4h 30m from Philippines.

What timezone is Philippines in?

Philippines operates on its local timezone.

What timezone is Tehran in?

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.

What are the business hours in Tehran?

Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.

Which countries use PHT (Philippine Time)?

PHT is used in Philippines.

Does PHT observe daylight saving time?

No, PHT does not observe daylight saving time and remains at UTC+08:00 year-round.

What are some interesting facts about PHT?

Philippine Time does not observe daylight saving, so UTC+08:00 is fixed all year. PHT shares its offset with China, Hong Kong, Singapore and Malaysia.