Unix Timestamp Converter

What is a Unix Timestamp?

A Unix timestamp (also known as Epoch time, Unix time, or POSIX time) is a system for describing a point in time as the total number of seconds that have elapsed since the Unix Epoch.

The Unix Epoch is precisely 00:00:00 Coordinated Universal Time (UTC), Thursday, 1 January 1970. Unlike a standard calendar date, Unix time is a linear measure. Because it uses a single number to represent a complex date/time structure, it is incredibly efficient for computers to process, sort, and store in databases.

Why Developers Use Unix Timestamps

For human users, timestamps are difficult to read, but for modern software architectures, they are the gold standard for temporal data:

Wait... Seconds or Milliseconds?

One of the most common pitfalls for junior developers is confusing seconds vs milliseconds.

• Unix Seconds (10 digits): System-level languages like PHP, Python, and C typically use seconds. Example: 1719360000.
• Unix Milliseconds (13 digits): JavaScript and Java frequently use milliseconds to provide higher resolution for UI interactions. Example: 1719360000000.

Our converter automatically detects the input type, ensuring your dates are accurate regardless of the source resolution.

Common Implementation Snippets

// Get current seconds
const seconds = Math.floor(Date.now() / 1000);

// Convert to Date
const date = new Date(1719398400 * 1000);

import time
from datetime import datetime

# Get current
now = int(time.time())

# Date object
dt = datetime.fromtimestamp(1719398400)