Set to Now
Unix Timestamp (seconds)
Copy
Unix Timestamp (milliseconds)
Copy
ISO 8601
Copy
Local Time
Copy
UTC Time
Copy
Date Breakdown
Year:

Month:

1 ()

Day:

Weekday:

Hour:

Minute:

Second:

Timezone:

How to Use the Timestamp Converter

Unix timestamps represent time as the number of seconds (or milliseconds) since January 1, 1970 (the Unix Epoch). This tool converts between Unix timestamps and human-readable date formats.

  1. Enter a Timestamp: Input a Unix timestamp (seconds or milliseconds) to see the corresponding date.
  2. Edit ISO Format: Modify the ISO 8601 string to update all other formats.
  3. Set to Now: Click "Set to Now" to populate with the current time.
  4. Copy Values: Use the Copy buttons to copy any format to your clipboard.

Understanding Time Formats

Unix Timestamp (Seconds)

The number of seconds since January 1, 1970 00:00:00 UTC. Commonly used in databases, APIs, and system logs. Example: 1704067200 represents January 1, 2024.

Unix Timestamp (Milliseconds)

Same as seconds but with millisecond precision. JavaScript Date.now() returns this format. Example: 1704067200000 (note the extra three zeros).

ISO 8601

International standard format: YYYY-MM-DDTHH:mm:ss.sssZ. The "T" separates date and time, "Z" indicates UTC. Used in JSON, APIs, and international systems.

UTC vs Local Time

UTC (Coordinated Universal Time) is the global time standard. Local time includes timezone offset. Always store dates in UTC and convert to local for display.

Common Use Cases

API Development

Debug timestamps in API responses, convert between formats for different systems, and validate date parsing logic.

Log Analysis

Convert Unix timestamps in server logs to readable dates for incident investigation and performance analysis.

Database Work

Verify timestamp values in database records, debug timezone issues, and prepare test data with specific dates.

Frequently Asked Questions

What is the Unix Epoch?

The Unix Epoch is January 1, 1970 00:00:00 UTC. Its the reference point from which Unix timestamps are calculated. Timestamps before this date are negative numbers.

Why do some timestamps have 10 digits and others have 13?

10-digit timestamps are in seconds, while 13-digit timestamps include milliseconds. Different systems use different precisions. JavaScript uses milliseconds, while many servers use seconds.

What is the Year 2038 problem?

32-bit systems store Unix timestamps as signed integers, which will overflow on January 19, 2038. Modern 64-bit systems use 64-bit integers, extending the range billions of years into the future.

How do I handle timezone conversions?

Unix timestamps are always in UTC. When displaying to users, convert to their local timezone. When storing, always use UTC. The ISO 8601 format includes timezone information explicitly (Z for UTC or +/-HH:MM for offset).