2025-01-15 12:00 UTC
- Translates to 1736932800 seconds since the epoch.
time calculator
Unix Timestamp Converter
Translate between human-readable dates and Unix timestamps (seconds since 1 Jan 1970 UTC).
Results
- Timestamp from date
- 1736942400.00
- Converted year
- 1970.00
- Converted month
- 1.00
- Converted day
- 1.00
- Converted hour
- 0.00
- Converted minute
- 0.00
- Converted second
- 0.00
- Readable UTC time
- 1970-01-01 00:00:00 UTC
How to use this calculator
- Enter a date and time (year, month, day, hour, minute, second).
- Optionally paste an existing Unix timestamp.
- See the date converted to epoch seconds and the timestamp converted back to a readable UTC date/time.
Inputs explained
- Date/time fields
- Year, month, day, hour, minute, second to convert into a Unix timestamp.
- Existing Unix timestamp
- Seconds since Jan 1, 1970 UTC to convert back into a date/time.
How it works
We convert the entered date/time into UTC and divide by 1,000 to get seconds since January 1, 1970.
Enter an existing timestamp to get the exact UTC year, month, day, and time — handy for debugging schedules or TTLs.
Formula
Unix time = Date.UTC(year, month, day, hour, minute, second) / 1000
When to use it
- Debugging API payloads or webhook signatures that use epoch seconds.
- Checking TTL/expiration values in logs or database records.
- Converting deployment schedules or cron outputs between human time and epoch time.
Tips & cautions
- Unix timestamps are always UTC. Convert local times to UTC first if needed.
- If you have milliseconds, divide by 1000 before pasting; multiply the output by 1000 to get milliseconds.
- Zero-padding months/days isn’t required—enter plain numbers.
- Handles seconds resolution; milliseconds require manual conversion.
- No timezone selection—assumes UTC per Unix timestamp specification.
- Dates must be in the Gregorian calendar.
Worked examples
Timestamp 1704067200
- Converts to 2023-12-31 00:00:00 UTC.
Deep dive
This Unix timestamp converter turns human-readable dates into epoch seconds and back. Enter a date/time or paste an epoch value to get the converted UTC result instantly.
Use it for API debugging, log analysis, or TTL checks. It supports seconds resolution; convert milliseconds by dividing or multiplying by 1000 as needed.
FAQs
- Is the conversion done in UTC or local time?
- All conversions run in UTC to match how Unix timestamps are defined.
- Can it handle milliseconds?
- Enter seconds for now. Millisecond support is on the roadmap—divide by 1000 before pasting if needed.
- Why is my local time different from the UTC output?
- Unix timestamps are UTC-based. Convert your local time to UTC first, or add your UTC offset to align times.
- Can I use negative timestamps?
- Yes. Negative values represent dates before Jan 1, 1970 UTC.
- Does daylight saving time change the timestamp?
- No. Timestamps are absolute in UTC; DST only affects local clock representations.
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Always confirm mission-critical timestamps inside your application or database before deploying changes.