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Developer Time Utility

Unix Timestamp & Epoch Converter

Convert Unix epoch timestamps to human dates, parse ISO 8601 strings, calculate timezone offsets, and perform timestamp date arithmetic in real time.

Current Unix Epoch Time
0000000000 seconds (0000000000000 ms)
Loading current UTC time...

1. Epoch Timestamp → Human Date

Formatted Date: -
UTC / GMT: -
ISO 8601: -
RFC 2822: -
Relative Time: -
Day of Week / Year: -

2. Human Date & Time → Epoch Timestamp

Epoch Seconds
0
Epoch Milliseconds
0

⚡ Quick Timestamp Date Arithmetic

Useful Unix Epoch Milestones & Reference Table

Milestone Event Epoch Seconds Date & Time (UTC) Notes
Unix Epoch Zero 0 1970-01-01 00:00:00 UTC Beginning of Unix time standard
1 Billion Seconds 1000000000 2001-09-09 01:46:40 UTC Celebrated milestone in computer science
2 Billion Seconds 2000000000 2033-05-18 03:33:20 UTC Upcoming epoch timestamp milestone
Year 2038 Bug (32-bit MAX) 2147483647 2038-01-19 03:14:07 UTC Maximum 32-bit signed integer epoch limit

Understanding Unix Timestamps & Epoch Time

A Unix timestamp (also known as POSIX time or Epoch time) measures time by tracking the total number of elapsed seconds since 00:00:00 UTC on January 1, 1970. Because it is an unambiguous integer independent of timezones or daylight saving adjustments, it serves as the universal standard for logging events, token expirations (such as JWT exp claims), database storage, and REST API communication.

How Timestamp Precision Levels Work

  • Seconds (10 digits): Standard Unix timestamp (e.g. 1772538000). Common in PHP (time()), Python (time.time()), and MySQL (UNIX_TIMESTAMP()).
  • Milliseconds (13 digits): 1/1,000th of a second. Standard in JavaScript (Date.now()) and Java (System.currentTimeMillis()).
  • Microseconds (16 digits): 1/1,000,000th of a second. Used in distributed tracing and high-precision telemetry.
  • Nanoseconds (19 digits): 1/1,000,000,000th of a second. Standard in Go (time.Now().UnixNano()) and Linux kernel clocks.