World Clock Calculator

What is a World Clock?

A world clock displays the current time in multiple cities and time zones around the globe simultaneously. It's an essential tool for international business, remote teams, travelers, and anyone communicating across time zones. Our world clock provides real-time updates, analog and digital displays, and helpful tools like time difference calculator and meeting planner.

Key Features

Our world clock offers comprehensive features:

• Live updates: All clocks update every second in real-time
• Dual display: Both analog and digital clock formats
• Multiple cities: Track as many cities as you need
• Day/Night indicator: Visual indication of day or night in each city
• DST detection: Automatic daylight saving time detection
• Time difference calculator: Calculate exact time differences between cities
• Meeting planner: Find optimal meeting times across multiple time zones
• Search cities: Search from hundreds of cities worldwide
• 12/24 hour format: Toggle between time formats

Understanding Time Zones

Time zones are regions that observe a uniform standard time:

• UTC (Coordinated Universal Time): The primary time standard
• GMT (Greenwich Mean Time): Often used interchangeably with UTC
• Offset: Time zones are defined by their offset from UTC (e.g., UTC+9 for Tokyo)
• DST (Daylight Saving Time): Seasonal clock adjustment, typically +1 hour
• IANA Time Zones: Standard database of time zones (e.g., America/New_York)

Major Time Zones

Some of the world's major time zones:

• UTC-8 (PST): Pacific Standard Time (Los Angeles, Vancouver)
• UTC-5 (EST): Eastern Standard Time (New York, Toronto)
• UTC+0 (GMT): Greenwich Mean Time (London, Lisbon)
• UTC+1 (CET): Central European Time (Paris, Berlin, Rome)
• UTC+3 (MSK): Moscow Time (Moscow, Istanbul)
• UTC+5:30 (IST): India Standard Time (Mumbai, Delhi)
• UTC+8 (CST): China Standard Time (Beijing, Singapore)
• UTC+9 (JST): Japan Standard Time (Tokyo, Seoul)
• UTC+10 (AEST): Australian Eastern Time (Sydney, Melbourne)

Using This Calculator

Follow these simple steps:

• Step 1: View your local time at the top with analog and digital displays
• Step 2: Search for cities or click popular city buttons to add them
• Step 3: View all world clocks updating in real-time
• Step 4: Use the time difference calculator to compare any two cities
• Step 5: Use the meeting planner to find optimal meeting times
• Step 6: Toggle between 12-hour and 24-hour format as needed
• Step 7: Remove cities you no longer need to track