Timestamp Converter

What is Unix Epoch Time?

Unix time is a system for tracking time as a single continuous numeric count of seconds elapsed since the Unix Epoch:Thursday, 1 January 1970 00:00:00 UTC.

Because it is a single integer, it is completely free of daylight saving time adjustments, local timezone offsets, or locale-specific string formatting issues. This makes Unix timestamps the gold standard for database records, JWT token expiration (exp claims), API cache invalidation headers, and distributed event logs.

Timestamp Precision & Unit Comparison

Code Cheat-Sheet: Getting & Converting Timestamps

• JavaScript / TypeScript (Browser & Node.js):

  // Current timestamp in seconds const nowSec = Math.floor(Date.now() / 1000); // Convert timestamp (seconds) to ISO Date string const isoDate = new Date(nowSec * 1000).toISOString();

• Python 3:

  import time from datetime import datetime, timezone # Current timestamp in seconds now_sec = int(time.time()) # Convert timestamp to human UTC date utc_date = datetime.fromtimestamp(now_sec, tz=timezone.utc).isoformat()

• Go (Golang):

  import ( "fmt" "time" ) // Current timestamp nowSec := time.Now().Unix() // Convert back to formatted time formatted := time.Unix(nowSec, 0).UTC().Format(time.RFC3339)

• Bash / Terminal:

  # Get current timestamp date +%s # Convert timestamp to human date (Linux) date -d @1726581600 "+%Y-%m-%d %H:%M:%S UTC"

The Year 2038 Problem (Y2038)

On 19 January 2038 at 03:14:07 UTC, the 32-bit signed integer used by older 32-bit computer architectures to store Unix time will exceed its maximum value of 2,147,483,647. The next tick will cause an integer overflow into negative numbers (-2,147,483,648), causing affected systems to reset their calendars to 13 December 1901.

Modern operating systems (Linux 64-bit, macOS 64-bit, Windows 64-bit) have transitioned to 64-bit time_t integers, which can safely track timestamps for over 292 billion years into the future.

Frequently Asked Questions