Unix Timestamp Converter — Convert Timestamps to Human-Readable Dates

Unix Timestamp Converter A Unix timestamp converter turns a raw number like 1743811200 into a readable date like 2026-03-24 00:00:00 UTC — or converts a date back into a timestamp for use in code, SQL queries, or API calls. This guide explains how Unix time works, the common mistakes that cause off-by-one bugs and timezone confusion, and how to work with timestamps correctly in JavaScript, Python, and SQL. What Is a Unix Timestamp? A Unix timestamp is the number of seconds elapsed since the Unix epoch: January 1, 1970, at 00:00:00 UTC. Epoch: 1970-01-01 00:00:00 UTC → timestamp 0 Now: 2026-03-24 00:00:00 UTC → timestamp 1742774400 (approx) The key properties: Timezone-free — a timestamp represents one absolute moment in time, regardless of timezone Sortable — comparing timestamps numerically gives chronological order Universal — every programming language and database understands Unix timestamps Seconds vs Milliseconds JavaScript uses milliseconds by default. Most Unix tools use second