Free Date to Unix Timestamp Converter — Convert Any Date to Epoch Time Instantly

What Is a Date to Unix Timestamp Converter?

A date to Unix timestamp converter transforms a human-readable date and time into a Unix epoch timestamp — the number of seconds since January 1, 1970 00:00:00 UTC. This is the inverse of timestamp-to-date conversion and is essential for developers, analysts, and anyone working with time-based data in code or databases.

Why Convert Dates to Unix Timestamps?

Unix timestamps are the standard way computers store and compare time. Converting dates to epoch format is necessary for:

• Database storage — Many databases store dates as integer timestamps for efficient sorting and comparison
• API requests — REST APIs often require epoch timestamps as query parameters
• Scheduling & cron jobs — Automated tasks use Unix time for precise scheduling
• Data filtering — Querying records between two dates is simpler with numeric timestamps
• Cross-platform compatibility — Unix timestamps work identically across programming languages and operating systems

How Date to Epoch Conversion Works

The Calculation

The converter calculates the total number of seconds between your specified date/time and the Unix epoch (January 1, 1970 UTC). It accounts for leap years, varying month lengths, and timezone offsets to produce an accurate result.

Time Zone Considerations

Unix timestamps are always in UTC. When converting a local date, you must account for your timezone offset. For example, March 4, 2026 at noon CST (UTC-6) would produce a different timestamp than noon UTC on the same date.

How to Use Our Date to Unix Timestamp Converter

1. Open the Date to Unix Timestamp tool
2. Enter a date and time (or select from the date picker)
3. Click Convert
4. Copy the resulting Unix timestamp for use in your code, database, or API call

Common Use Cases

• Setting API parameters — Many endpoints require start_date and end_date as epoch values
• Database inserts — Store event dates as integers for faster queries
• Cron scheduling — Calculate exact epoch times for one-shot scheduled tasks
• Log correlation — Convert known event times to timestamps for searching server logs
• Countdown timers — Calculate seconds until a future date for countdown applications

Best Practices

• Always specify the timezone when converting — ambiguity causes bugs
• Use seconds for standard Unix timestamps, milliseconds for JavaScript environments
• Validate your output with a reverse conversion to catch errors
• Store timestamps as 64-bit integers to avoid the Year 2038 overflow issue

Related Tools

Explore more developer and time conversion tools:

• Unix Timestamp to Date — Convert epoch time back to a human-readable date
• JSON Validator & Beautifier — Format and validate JSON data
• Base64 Encoder — Encode strings and data for safe URL transmission
• URL Encoder — Encode special characters in URLs and query strings

Frequently Asked Questions

What timezone does the converter use?

Unix timestamps are always based on UTC. If you enter a date without specifying a timezone, it is typically treated as UTC. Adjust for your local timezone if needed.

Can I convert dates before 1970?

Yes. Dates before the Unix epoch (January 1, 1970) produce negative timestamps. For example, December 31, 1969 at midnight UTC is -86400.

What's the difference between seconds and milliseconds?

Standard Unix timestamps use seconds (10-digit numbers). JavaScript and some APIs use milliseconds (13-digit numbers). Multiply by 1,000 to convert seconds to milliseconds.

How accurate is the conversion?

Our converter is accurate to the second. For sub-second precision, you would need to include fractional seconds or use millisecond timestamps.