Time Zone Converter
Convert any time from one timezone to another
Date & Time Formatter
Format any date and time using various string formats including Zulu time (UTC)
Formatted Results:
date.toISOString()
datetime.utcnow().isoformat() + 'Z'
Instant.now().toString()
DateTime.UtcNow.ToString("o")
std::format("{:%FT%TZ}", std::chrono::utc_clock::now())
Instant.now().toString()
time.Now().UTC().Format(time.RFC3339Nano)
Utc::now().to_rfc3339()
date.toUTCString()
datetime.utcnow().strftime("%a, %d %b %Y %H:%M:%S GMT")
DateTimeFormatter.RFC_1123_DATE_TIME.format(ZonedDateTime.now(ZoneOffset.UTC))
DateTime.UtcNow.ToString("R")
std::format("{:%a, %d %b %Y %H:%M:%S GMT}", ...)
ZonedDateTime.now(ZoneOffset.UTC).format(DateTimeFormatter.RFC_1123_DATE_TIME)
Math.floor(Date.now() / 1000)
int(datetime.now().timestamp())
Instant.now().getEpochSecond()
DateTimeOffset.UtcNow.ToUnixTimeSeconds()
std::chrono::duration_cast<std::chrono::seconds>(std::chrono::system_clock::now().time_since_epoch()).count()
Instant.now().epochSecond
time.Now().Unix()
SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs()
date.toUTCString().replace(' GMT', ' UTC')
datetime.utcnow().strftime("%a, %d %b %Y %H:%M:%S UTC")
ZonedDateTime.now(ZoneOffset.UTC).format(DateTimeFormatter.ofPattern("EEE, dd MMM yyyy HH:mm:ss 'UTC'"))
DateTime.UtcNow.ToString("ddd, dd MMM yyyy HH:mm:ss 'UTC'")
Intl.DateTimeFormat('en-US', {year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', second: '2-digit', hour12: false}).format(date)
datetime.now().strftime("%m/%d/%Y %H:%M:%S")
DateTimeFormatter.ofPattern("MM/dd/yyyy HH:mm:ss").format(LocalDateTime.now())
DateTime.Now.ToString("MM/dd/yyyy HH:mm:ss")
std::format("{:%m/%d/%Y %H:%M:%S}", std::chrono::system_clock::now())
LocalDateTime.now().format(DateTimeFormatter.ofPattern("MM/dd/yyyy HH:mm:ss"))
Intl.DateTimeFormat('en-GB', {year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', second: '2-digit', hour12: false}).format(date)
datetime.now().strftime("%d/%m/%Y %H:%M:%S")
DateTimeFormatter.ofPattern("dd/MM/yyyy HH:mm:ss").format(LocalDateTime.now())
DateTime.Now.ToString("dd/MM/yyyy HH:mm:ss")
std::format("{:%d/%m/%Y %H:%M:%S}", std::chrono::system_clock::now())
LocalDateTime.now().format(DateTimeFormatter.ofPattern("dd/MM/yyyy HH:mm:ss"))
new Date().toISOString().slice(0, -1) + timezoneOffset
datetime.now().isoformat()
ZonedDateTime.now().format(DateTimeFormatter.ISO_OFFSET_DATE_TIME)
DateTime.Now.ToString("yyyy-MM-ddTHH:mm:sszzz")
std::format("{:%FT%T%z}", std::chrono::zoned_time{...})
ZonedDateTime.now().format(DateTimeFormatter.ISO_OFFSET_DATE_TIME)
time.Now().Format(time.RFC3339)
Local::now().to_rfc3339()
date.toISOString().slice(0, 19).replace('T', ' ')
datetime.now().strftime("%Y-%m-%d %H:%M:%S")
LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"))
DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")
std::format("{:%Y-%m-%d %H:%M:%S}", std::chrono::system_clock::now())
LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"))
NOW() or DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%s')
NOW() or to_char(NOW(), 'YYYY-MM-DD HH24:MI:SS')
Popular Timezones
Understanding Time Zones: A Complete Guide
World Clock 24 is a free online tool that displays the current date and time in any timezone worldwide. Whether you need to check the time in New York, London, Tokyo, or any other major city, our world clock provides accurate, real-time information synchronized with international time standards.
What Are Time Zones?
A time zone is a region of the Earth that observes a uniform standard time for legal, commercial, and social purposes. Time zones tend to follow the boundaries of countries and their subdivisions because it's convenient for areas in close commercial or other communication to keep the same time. The world is divided into 24 time zones, each approximately 15 degrees of longitude apart, which corresponds to one hour of time difference.
The concept of time zones was first proposed by Sir Sandford Fleming, a Canadian railway planner, in 1879. Before standardized time zones, each city would set its clocks based on local solar noon, leading to hundreds of different local times. This created confusion for railway schedules, telegraph communication, and international commerce.
Coordinated Universal Time (UTC)
UTC is the primary time standard by which the world regulates clocks and time. It is effectively a successor to Greenwich Mean Time (GMT). The Coordinated Universal Time system was officially adopted in 1963 and became the international standard in 1972. UTC is maintained by the International Bureau of Weights and Measures (BIPM) and is based on atomic clocks, making it extremely accurate.
Most time zones are offset from UTC by a whole number of hours (UTC−12 to UTC+14). However, some regions use offset times that are not whole hours. For example, India Standard Time (IST) is UTC+5:30, and Nepal uses UTC+5:45.
Daylight Saving Time (DST)
Daylight Saving Time is the practice of setting clocks forward one hour from standard time during the summer months, and back again in the fall, to make better use of natural daylight. The concept was first implemented during World War I to save energy. However, not all countries observe DST, and those that do don't always change on the same dates.
In the United States, DST typically begins on the second Sunday in March and ends on the first Sunday in November. In Europe, DST starts on the last Sunday in March and ends on the last Sunday in October. Many countries near the equator don't observe DST at all, as the difference in daylight hours between seasons is minimal.
Our world clock automatically accounts for daylight saving time changes, ensuring you always see the correct local time regardless of the season.
Key Features of World Clock 24
- Multiple Timezones: View time in any timezone around the globe, from UTC+14 (Line Islands) to UTC-12 (Baker Island)
- Real-time Updates: Our clock automatically updates every second, providing accurate time synchronized with international time standards
- 12/24 Hour Format: Toggle between 12-hour (AM/PM) and 24-hour military time format to suit your preference
- Time Zone Converter: Convert any time from one timezone to another instantly, perfect for scheduling international meetings
- Popular Cities: Quick access to major cities worldwide with their current local times
- Mobile Friendly: Responsive design works seamlessly on all devices - desktop, tablet, and mobile
Major Time Zones Around the World
Our world clock supports all major time zones including:
- UTC (Coordinated Universal Time): The basis for all time zones worldwide
- EST/EDT (Eastern Time): UTC-5/UTC-4, used in New York, Washington D.C., and much of the eastern United States
- CST/CDT (Central Time): UTC-6/UTC-5, used in Chicago, Dallas, and central United States
- MST/MDT (Mountain Time): UTC-7/UTC-6, used in Denver, Phoenix, and mountain regions
- PST/PDT (Pacific Time): UTC-8/UTC-7, used in Los Angeles, San Francisco, and the west coast
- GMT/BST (Greenwich Mean Time/British Summer Time): UTC+0/UTC+1, used in London and the United Kingdom
- CET/CEST (Central European Time): UTC+1/UTC+2, used in Paris, Berlin, Rome, and much of central Europe
- EET/EEST (Eastern European Time): UTC+2/UTC+3, used in Helsinki, Athens, and eastern Europe
- IST (India Standard Time): UTC+5:30, used throughout India
- CST (China Standard Time): UTC+8, used in Beijing, Shanghai, and throughout China
- JST (Japan Standard Time): UTC+9, used in Tokyo and throughout Japan
- AEST/AEDT (Australian Eastern Time): UTC+10/UTC+11, used in Sydney and Melbourne
Practical Uses for World Clock 24
Whether you're a business professional coordinating with international clients, a traveler planning your itinerary, or someone with friends and family across different continents, our world clock helps you stay connected:
- International Business: Schedule meetings with colleagues across different time zones without confusion
- Travel Planning: Know what time it is at your destination before you arrive
- Remote Work: Coordinate with team members in different countries effectively
- Personal Connections: Know the best time to call friends and family overseas
- Event Coordination: Plan virtual events that work for participants worldwide
How Time Zones Affect Daily Life
Time zones play a crucial role in our globalized world. Stock markets, news broadcasts, airline schedules, and international communications all depend on accurate time zone information. Understanding time zones helps prevent misunderstandings and ensures smooth coordination across borders.
For example, when it's 9:00 AM in New York (Eastern Time), it's already 2:00 PM in London (GMT), 10:00 PM in Tokyo (JST), and 7:00 PM in Sydney (AEST). These differences become even more complex when daylight saving time is involved, which is why our automatic time zone conversion tool is so valuable.
Why Choose World Clock 24?
World Clock 24 offers a clean, easy-to-use interface that makes checking times across the globe simple and intuitive. Our service is completely free, requires no registration, and works instantly in your web browser. The real-time updates ensure you always have accurate information, and our time zone converter makes scheduling across borders effortless.
Whether you need to check the current time in a specific city, convert a meeting time from one timezone to another, or simply stay aware of what time it is in cities around the world, World Clock 24 is your reliable companion for all your time zone needs.
Learn More About Time Zones
Expand your knowledge with our comprehensive guides:
- Understanding Time Zone Basics - A beginner's guide to how time zones work
- Daylight Saving Time Explained - Everything you need to know about DST
- Scheduling International Meetings - Tips and best practices for global coordination