Track time across timezones, convert unix timestamps, and calculate dates. All in your browser.
Timezone is a free timezone and time converter for people who work across time zones. Convert between any timezone, translate Unix timestamps into readable dates, compare several time zones side by side, and do quick date math — all in your browser.
Coordinating across time zones is a daily headache for remote teams, freelancers, and developers working with global clients or servers — a meeting invitation can quietly be an hour off, and a misplaced Unix timestamp can break a deployment. Timezone solves both problems in one place: convert any time into every zone you care about, decode epoch timestamps into readable dates, line up multiple zones to find a slot that works for everyone, and do quick date arithmetic for deadlines and schedules. It runs entirely in your browser, with no accounts and nothing to install.
Remote teams use Timezone to schedule meetings and deadlines that work across every member's timezone. Instead of converting a meeting time in your head — and getting it wrong when daylight saving changes — you can line up all the relevant zones at once and see instantly where 3 PM for one person falls for everyone else.
Developers use the epoch converter constantly: log files, API payloads, and database timestamps store time as Unix seconds, and pasting one into Timezone turns it into a readable local date in a single click. Freelancers and travelers use the date-math tool to plan project deadlines and trip dates without opening a calendar app.
Timezone shows you the current time in multiple timezones simultaneously. Use the "Add a timezone" dropdown to select timezones you want to track. Your local time is always shown first. All timezones update in real-time.
A Unix timestamp counts the number of seconds since January 1, 1970 (UTC) — known as the Unix epoch. Computers use this format to store time as a single integer. Timezone lets you convert between human-readable dates and Unix timestamps in both directions.
Yes! Add up to 8 timezones to your list and see them all displayed simultaneously. Each timezone card shows the current time and UTC offset. You can remove any timezone by clicking the ✕ button. Your selections are saved in your browser for future visits.
Yes. Timezone uses the browser's built-in Internationalization API (Intl.DateTimeFormat), which automatically accounts for daylight saving time rules based on the IANA timezone database. You never need to manually adjust for DST changes.
Date Math lets you add or subtract days, weeks, months, or years from any start date. Pick a start date, choose an operation (add/subtract), enter an amount, and select a unit. The result updates instantly — perfect for calculating deadlines, project timelines, or expiration dates.
Timezone uses the IANA timezone database through your browser's built-in internationalization support, so you can add any of the hundreds of recognized zones — America/New_York, Europe/London, Asia/Tokyo, and many more. The dropdown lets you search by city or zone name, and each card displays the current time plus its UTC offset.
Yes — Timezone converts in both directions. Paste a Unix timestamp (seconds since January 1, 1970 UTC) into the Epoch Converter and it instantly shows the equivalent weekday, date, and time in your local timezone. You can also pick any date and time and get the corresponding Unix seconds, ready to paste into code or an API.
UTC (Coordinated Universal Time) is the atomic time standard that all timezones are measured against, while GMT (Greenwich Mean Time) is a timezone centered on the Greenwich meridian. For practical scheduling they are effectively identical, and modern systems — including the browser APIs Timezone uses — are based on UTC.