World Clock: How to Track Time Zones for Remote Meetings and Travel

Scheduling a meeting across New York, London, and Tokyo — or just calling a friend on the other side of the planet — is where time zone math goes wrong. A World Clock removes the guesswork by showing the current time in multiple cities at once.

UTC Offsets Explained

Every time zone is defined by its offset from UTC (Coordinated Universal Time). For example:

City	Standard Offset
New York	UTC−5 (EST)
London	UTC+0 (GMT)
Berlin	UTC+1 (CET)
Tokyo	UTC+9 (JST)
Sydney	UTC+10 (AEST)

The difference between two cities is simply the difference between their offsets: Tokyo is 14 hours ahead of New York in standard time. When it is 9:00 AM in New York, it is 11:00 PM in Tokyo.

Daylight Saving Time Gotchas

Offsets change twice a year in many regions — and not on the same dates everywhere. Europe and North America switch on different weekends, and countries like Japan, India, and China do not observe DST at all. A static offset table goes stale; a live World Clock always shows the current time with DST already applied.

A Real-World Example: One Meeting, Three Time Zones

A team in New York, London, and Tokyo wants to meet. Pick 9:00 AM New York time in summer:

Location	Local Time	Verdict
New York (EDT, UTC−4)	9:00 AM	Start of day ✅
London (BST, UTC+1)	2:00 PM	Mid-afternoon ✅
Tokyo (JST, UTC+9)	10:00 PM	Late evening ⚠️

Rotating the meeting time between regions spreads the pain fairly — and checking three cities in one glance is exactly what a world clock is for.

How to Use a World Clock for Remote Work

• Pin the cities your team and clients are in so you always see them at a glance.
• Before proposing a meeting, check whether it lands in someone’s 2:00 AM.
• Note the DST switch dates for each region so your recurring meetings do not drift by an hour.
• For travel, compare your home city against your destination to plan arrival and communication windows.

Stop doing mental math across time zones — open the World Clock and see the current time in every city that matters to you.