Unix Timestamp Converter
Appliance Location: The Spice Rack Epoch TimeHow to Convert Unix Timestamps
Converting between Unix timestamps and human-readable dates is simple:
- Timestamp to Date: Enter a Unix timestamp (seconds or milliseconds) to see the corresponding local and UTC dates.
- Date to Timestamp: Pick a date and time, select time zone, and get the Unix timestamp in both seconds and milliseconds.
- View Time Zones: See how the current timestamp converts across major time zones.
- Copy and Use: Copy timestamp values for use in databases, APIs, or code.
Use the refresh button to update the current timestamp in real-time.
What is a Unix Timestamp?
The Unix timestamp (also called Unix time, Epoch time, or POSIX time) is a system for tracking time as a running count of seconds. The "epoch" begins on January 1, 1970 at 00:00:00 UTC. This system is used extensively in computing:
Database Storage: MySQL, PostgreSQL, and other databases store timestamps as integers for efficient sorting and indexing.
APIs: REST APIs often return timestamps in JSON responses for consistent date handling across time zones.
Log Files: Server logs use timestamps to record event times precisely.
File Systems: File modification times (mtime) are stored as Unix timestamps.
Programming: JavaScript's Date.now(), PHP's time(), Python's time.time() all return Unix timestamps.
Seconds vs Milliseconds
Seconds (10 digits): Standard Unix timestamp used in most databases and server-side languages (PHP, Python, Ruby, MySQL). Example: 1738963200
Milliseconds (13 digits): Used in JavaScript (Date.now()), Java (System.currentTimeMillis()), and .NET. Example: 1738963200000
Conversion: Multiply seconds by 1000 to get milliseconds, divide milliseconds by 1000 to get seconds.
Unix Timestamp Limits
Year 2038 Problem: 32-bit systems store timestamps as signed 32-bit integers. The maximum value (2,147,483,647) corresponds to January 19, 2038 at 03:14:07 UTC. After this, 32-bit timestamps will overflow. 64-bit systems support timestamps for billions of years.
Timestamp Reference Table
| Description | Timestamp (Seconds) | Timestamp (Milliseconds) | Date |
|---|---|---|---|
| Unix Epoch | 0 | 0 | Jan 1, 1970 00:00:00 UTC |
| Y2K | 946684800 | 946684800000 | Jan 1, 2000 00:00:00 UTC |
| Facebook Launch | 1072915200 | 1072915200000 | Jan 1, 2004 00:00:00 UTC |
| iPhone Launch | 1186099200 | 1186099200000 | Aug 3, 2007 00:00:00 UTC |
| COVID-19 Start | 1583020800 | 1583020800000 | Mar 1, 2020 00:00:00 UTC |
| Current (approx) | 1738963200 | 1738963200000 | Feb 8, 2025 |
Common Programming Uses
JavaScript
Date.now() // milliseconds since epoch
new Date(1738963200000) // convert to Date object
Math.floor(Date.now() / 1000) // seconds since epoch
Python
import time; time.time() // seconds as float
import datetime; datetime.datetime.fromtimestamp(1738963200)
PHP
time() // seconds since epoch
date('Y-m-d H:i:s', 1738963200) // format timestamp
MySQL
SELECT FROM_UNIXTIME(1738963200); // timestamp to datetime
SELECT UNIX_TIMESTAMP('2025-02-08 00:00:00'); // datetime to timestamp
Frequently Asked Questions
What is the Unix epoch?
The Unix epoch is January 1, 1970 at 00:00:00 UTC. Timestamps count seconds (or milliseconds) elapsed since this moment.
What is the difference between seconds and milliseconds timestamps?
Seconds timestamps (10 digits) are used in databases and server-side languages. Milliseconds timestamps (13 digits) are used in JavaScript and Java. Multiply seconds by 1000 to get milliseconds.
What is the Year 2038 problem?
32-bit systems store timestamps as signed 32-bit integers (max 2,147,483,647). On January 19, 2038 at 03:14:07 UTC, 32-bit timestamps will overflow. 64-bit systems are safe.
How do I get the current timestamp?
The current timestamp is displayed at the top of the page and updates in real-time. Use JavaScript: Date.now() for milliseconds, Math.floor(Date.now()/1000) for seconds.
Why do timestamps sometimes have negative values?
Negative timestamps represent dates before the Unix epoch (before Jan 1, 1970). For example, timestamp -1 is Dec 31, 1969 at 23:59:59 UTC.
What time zone are Unix timestamps in?
Unix timestamps are always in UTC (Coordinated Universal Time). They represent the same moment worldwide, regardless of local time zone.
Can I convert timestamps from the far future?
Yes. 64-bit systems support timestamps for billions of years. Our converter uses JavaScript's Date object which supports years up to 275,760.
Is this tool free to use?
Yes, completely free with no usage limits. Convert as many timestamps as you need.
