Timestamp

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Timestamp Information

Current Unix Timestamp

Seconds since Jan 1, 1970 UTC

Time Difference

Day, Month, Year Start/End

Epoch dates for the start and end of the year/month/day

Start / End

Convert Seconds to Other Units

in 1 day, in 1 hour, in 0 minutes, in 0 seconds

90000 Seconds

1500.0000 Minutes

25.0000 Hours

1.0417 Days

0.1488 Weeks

0.0342 Months

0.0029 Years

Note: years are calculated using 365.2425 days per year. This is using the Gregorian calendar with a leap day every 4 years, but not every 100 years except in every 400 years. 365.2422 would be an astrologically year, but the calendars we use are based off of 365.2425. Read more

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What is GMT?

Greenwich Mean Time (GMT) is a time standard that was established to help coordinate timekeeping worldwide. Originating from the Royal Observatory in Greenwich, London, GMT was used as the baseline for time zones around the world. Although it has largely been replaced by Coordinated Universal Time (UTC) for scientific and technical purposes, GMT remains in common use for everyday timekeeping and as a reference in some regions.

What is UTC?

Coordinated Universal Time (UTC) is the time standard used globally to synchronize clocks and timekeeping systems. Introduced in 1960, UTC combines atomic timekeeping with astronomical observations to provide a precise and consistent reference. Unlike GMT, which is based on Earth's rotation, UTC is based on atomic clocks, making it more accurate and stable. It serves as the basis for time zones worldwide and is crucial for international communication and technology.

What is the difference between GMT and UTC?

Greenwich Mean Time (GMT) is a time zone based on the mean solar time at the Royal Observatory in Greenwich and is affected by Earth's irregular rotation and the equation of time. In contrast, Coordinated Universal Time (UTC) is a time standard that combines atomic time, measured by atomic clocks, with astronomical observations and uses periodic leap seconds to stay aligned with Earth's rotation. While GMT serves as a reference for some time zones, UTC provides a more precise and stable measure of time, used globally for synchronization and scientific purposes. GMT and UTC are closely aligned, but GMT can drift slightly, whereas UTC maintains accuracy with leap second adjustments, resulting in a difference of only a fraction of a second.

New York time, like other time zones, is defined as an offset from UTC (e.g., UTC-5 or UTC-4) but does not directly involve leap seconds. Leap seconds are adjustments made to UTC itself to keep it aligned with Earth's rotation. Local time zones, including New York, adjust their time based on these updates to UTC.

What is a Unix Timestamp?

The Unix timestamp counts the seconds since January 1, 1970, at 00:00:00 UTC, excluding leap seconds. This doesn't change based on timezone or location, making it a consistent metric for computers to track and compare moments in time. It is often used in software and databases to ensure consistent timekeeping. It is also called Unix time, POSIX time, or Epoch time.

End of Unix Time

On Jan 19, 2038, Unix timestamps in 32-bit systems will overflow and reset, which could cause potential software bugs. This is known as the Year 2038 problem. For 64-bit systems, Unix time will remain accurate for approximately 292 billion years. This transition ensures long-term reliability in timekeeping for modern computer systems.

ISO 8601

ISO 8601 is an international standard for date and time representation, issued by the International Organization for Standardization (ISO) and first published in 1988. It provides a clear, consistent format to avoid misinterpretation and confusion, especially when data is exchanged across countries with different conventions.