About WorldTimeWise
WorldTimeWise is a free collection of tools for working with time across the world: current times by city, a time zone converter, a meeting planner, date calculators, calendars, holiday lists, sunrise and sunset data, moon phases, countdowns, timers, and a stopwatch.
The site exists for a simple reason. Coordinating across time zones is genuinely error-prone work — a one-hour mistake from daylight saving can mean a missed meeting, and a wrong date calculation can throw off a deadline. We built a set of small, fast tools that do these calculations correctly, without ads, sign-ups, or clutter getting in the way.
What the site offers
- World clock and city times — the current time in cities around the world, with UTC offsets and daylight saving status.
- Time zone converter and meeting planner — convert a time between zones, or line up several cities at once to find a workable meeting slot.
- Date calculators — days between dates, add or subtract days, week numbers, day of the year, age calculations, and more.
- Calendars and holidays — monthly and yearly calendars, and holiday lists by country.
- Sun and moon — sunrise, sunset, and twilight times, moon phases, and eclipse information.
- Countdowns, timers, and stopwatch — count down to events, run preset timers, or time something precisely.
How the site works
Everything runs in your browser. There are no accounts, no downloads, and no personal data stored on our servers. Time zone calculations use the IANA time zone database through your browser's built-in capabilities, which means daylight saving rules are the ones actually in force for the dates you ask about — including historical dates. You can read more in our methodology page.
What we won't do
We don't copy content or design from other time and date websites. Every page, calculation, and explanation here is written independently. We don't invent statistics, user counts, reviews, or awards — if a number appears on a page, it was computed from a stated source or from data you entered. We don't claim to be the most accurate or the fastest; we just do the work carefully and show our methods.
Funding
The site is kept online with minimal running costs — essentially the domain registration and free hosting tiers. There are no ads and no paid features. If that ever changes, we will say so plainly on this page.
WorldTimeWise is an independent project, maintained as a side effort. Corrections and suggestions are welcome; the fastest way to reach us is described on the contact page.