Unix Timestamp Converter: Convert Epoch Time to UTC & Local Date
Convert Unix epoch timestamps in seconds or milliseconds into human-readable UTC and local date formats, ISO 8601 strings, and relative times.
Timestamp Conversion Breakdown
ISO 8601 (UTC)
1970-01-01T00:00:00.000Z
UTC Format
Thu, 01 Jan 1970 00:00:00 GMT
Local Browser Time
1/1/1970 12:00:00 AM
Relative Time
20752 days ago
Day of the Week
Thursday
Leap Year / Day of Year
Regular Year (Day 1)
How to Use Unix Timestamp Converter
- Enter an epoch timestamp in seconds (e.g. 0, 1700000000) or milliseconds.
- View the instant conversion to UTC date, local date, ISO 8601 string, and relative time.
- Copy the timestamps or explanations with one click.
Practical Examples
Epoch Origin Zero Test
Verifies standard 1970-01-01 UTC epoch conversion.
Input:
0
Output:
1970-01-01T00:00:00.000Z
Common Mistakes & Troubleshooting
- Confusing seconds with milliseconds: Unix timestamps in seconds are typically 10 digits (~1.7 billion), whereas JavaScript Date timestamps are 13 digits.
Frequently Asked Questions
What is the Unix epoch timestamp?
The Unix epoch timestamp is the number of seconds that have elapsed since Thursday, 1 January 1970 00:00:00 UTC, not counting leap seconds.