World Clock
Compare times across 8+ cities globally, and convert UTC/local timezones for meetings and cron jobs.
19:50
Tuesday, July 28
UTC
Smart DST Detection
Automatically accounts for Daylight Saving Time (DST) rules worldwide based on the selected date. No manual adjustment needed.
Business Hour Overlay
Cards highlight in Indigo when a city is within standard working hours (9 AM - 6 PM local time).
World Clock Use Cases
Frequently Asked Questions
Q. Is Daylight Saving Time (DST) calculated automatically?
Yes, we automatically apply IANA time zone DST rules.
Q. How do I check business hours overlap?
Look at the visual timeline—it highlights 9 AM to 5 PM for each city.
Q. What is the difference between UTC and GMT?
UTC is a time standard, whereas GMT is a time zone. For most practical purposes, they are the same.
Q. Do Korea and Japan use DST?
No, Korea (KST) and Japan (JST) do not currently observe Daylight Saving Time.
Q. Can I bookmark the selected cities?
Yes, the selected cities are saved in the URL, so you can bookmark or share it.
DST Application by Region
| Region | DST Status | Active Period | Note |
|---|---|---|---|
| US/Canada | Applied | 2nd Sun Mar - 1st Sun Nov | Excludes AZ, HI |
| Europe (EU) | Applied | Last Sun Mar - Last Sun Oct | Unified EU schedule |
| Australia | Applied | 1st Sun Oct - 1st Sun Apr | Excludes QLD, WA, NT |
| New Zealand | Applied | Last Sun Sep - 1st Sun Apr | |
| Korea (KST) | Not Applied | - | UTC+9 fixed |
| Japan (JST) | Not Applied | - | UTC+9 fixed |
| China (CST) | Not Applied | - | UTC+8 fixed |
| India (IST) | Not Applied | - | UTC+5:30 fixed |
| Middle East | Mixed | Varies | Most countries discontinued DST |
Beware of cron job skips/duplicates on DST transition days.
Global Team Meeting Matrix
Seoul (UTC+9) aligned with major cities.
Key Features
- Real-time 8+ city synchronization
- Visual 9-to-5 business hour indicators
- Automatic IANA DST handling
- No-server, 100% local calculation
A professional world clock for global teams. Schedule meetings across multiple time zones, calculate UTC for cron jobs, and check visual business hours.