Every Date
Answer, Instantly
Every date and time answer in one place — timestamps, timezones, countdowns, date differences, and business-day counts, all computed in your own browser.
Date & Time Utilities
Five focused tools for the calendar questions that come up at work.
Why Dates Deserve Their Own Tools
Calendar arithmetic is deceptively hard. Months are different lengths, leap years break simple division, timezone offsets shift twice a year in some countries and never in others, and a "day" is not always twenty-four hours long. These tools handle those edge cases so you do not have to think about them.
Built on the real timezone database
The timezone converter formats a single instant with named IANA zones instead of adding fixed hour offsets. That means daylight saving rules, historical changes, and half-hour zones like Kolkata and Adelaide are all handled correctly.
Made for developers and planners alike
Debug an epoch value out of a log file, work out how many business days a contract has left to run, or count down to a launch. The same set of tools covers the engineering and the scheduling side.
Nothing leaves your device
Project deadlines and meeting schedules can be commercially sensitive. Every calculation runs client-side, so no date you type is ever sent to us or logged anywhere.
No installs, no accounts
Each page is a small static document that loads in an instant and works on a phone as well as a desktop. There is nothing to sign up for and nothing to download.
Frequently asked questions
Are these date and time tools free?
Yes. Every tool here is free with no usage limits, no trial, and no premium tier. Display advertising keeps the site running so the tools can stay free.
Where does the conversion happen?
In your browser. All five tools use the JavaScript Date and Intl APIs that ship with every modern browser, so nothing you enter is transmitted to a server or stored anywhere.
Which timezone do the tools use by default?
Your device's own timezone, as reported by the browser. Where a tool shows both UTC and local values, the local column follows whatever timezone your operating system is set to.
Do the tools handle daylight saving time correctly?
Yes. The timezone converter formats a single instant in time using the browser's IANA timezone database rather than adding fixed offsets, so daylight saving transitions are applied automatically for every named zone.
What is a Unix timestamp?
It is the number of seconds that have elapsed since midnight UTC on 1 January 1970, a moment known as the Unix epoch. Many APIs, log files, and databases store times this way because a single integer is unambiguous across timezones.
Do I need an account or an app?
No. There is no sign-up, no login, and nothing to install. Open a tool and it works immediately, including on phones and tablets.
Do the tools keep working offline?
Once a page has loaded it will keep functioning without a connection, because every calculation runs locally. The live clock and countdown read your device clock, not a network time source.