TimezoneAlarm

Smart cross-timezone alarms—set a time in any country or city; rings on your device when your local clock hits the right moment.

TimezoneAlarm — Smart Cross-Timezone Alarms for Chrome Have you ever set an alarm for the wrong hour because you had to do the time-zone math in your head? Missed an overseas meeting, a call with family living abroad, a product launch, or a booking window that opened at midnight in another country? TimezoneAlarm exists to make that mistake impossible. Instead of forcing you to calculate "what time is 9 AM in Beijing where I live," you simply choose the place, choose the time there, and TimezoneAlarm converts it to your local clock automatically and rings on your device at exactly the right moment. Set it there. Ring it here. That is the entire idea — and it becomes surprisingly powerful the moment your work or personal life crosses even a single time zone. WHAT TIMEZONEALARM DOES TimezoneAlarm is a lightweight browser extension that turns any city or country in the world into an alarm you can trust. Pick a target location — Tokyo, Lagos, New York, Auckland, São Paulo, London — set the time you care about in that location, and the extension does the conversion for you. It shows the target time and your local ring time side by side, so there is never any doubt about when it will actually go off. When the moment arrives, TimezoneAlarm alerts you right in your browser with a pop-up and an optional sound, so you never have to keep a mental spreadsheet of offsets again. Because everything runs in your browser, there is nothing heavy to install and nothing to configure. Open a new tab, add an alarm, and get back to work. The extension stays out of your way until it is time to remind you. KEY FEATURES Timezone-aware alarms: Lock any alarm to a global city or country. TimezoneAlarm displays both the target time and your converted local ring time, so what you see is exactly what will happen. Automatic local conversion: Choose a city and the alarm rings at your local time. No manual offset math, no "is it plus eight or minus five" guessing, and no missed calls because you rounded the wrong way. Accurate daylight saving handling: Time zones change twice a year in many regions. TimezoneAlarm applies daylight saving start and end dates automatically, so an alarm you set months in advance still fires at the correct local time after the clocks spring forward or fall back. 140,000+ cities across 214 countries: Search a vast database of cities and regions, each mapped to its correct time-zone identifier. Whether you need a capital city or a small town your client happens to live in, it is almost certainly there. Flexible repeat rules: Choose daily, weekly, monthly, interval, or one-time alarms. Set a recurring 9 AM headquarters stand-up, a weekly call with a partner overseas, a monthly reminder for an international invoice, or a single one-off wake-up before a flight. Pop-up and sound alerts: Get a clear on-screen notification when an alarm fires, with an optional sound so it grabs your attention even when you are heads-down in another tab. Dual alert modes mean important cross-border moments are hard to miss. Saved cities and live times: Keep a list of the cities that matter to you — clients, teammates, family, friends — and check their current local time at a glance before you send a message or schedule a call. Cloud sync across your devices: Sign in and your alarms and saved cities stay consistent across TimezoneAlarm on Chrome, Windows, macOS, Linux, Android and the web app. Set something on your laptop and it is there on your phone too. Works on Microsoft Edge: TimezoneAlarm is built for Chromium browsers, so the same extension installs and runs on Microsoft Edge with no extra steps. Multiple interface languages: Use the extension in the language you are most comfortable with, and switch anytime. WHO IT IS FOR AND HOW PEOPLE USE IT Cross-border professionals and remote teams. If your workday touches other countries, TimezoneAlarm is built for you. A salesperson in Lagos who needs to join a "9 AM Beijing time" call can set the alarm to Beijing time and let the extension ring at the correct local hour — even during a daylight saving change that would otherwise throw the calculation off. Remote teams spread across continents can set recurring reminders anchored to headquarters time, so nobody has to keep converting the schedule by hand. International travelers. Before you leave, or the moment you land, set an alarm for "2 PM local time in Queenstown" to meet a guide, catch a tour, or make a reservation. Jet lag makes mental time-zone math even harder, and TimezoneAlarm removes that burden so you show up on time in an unfamiliar place. Students studying abroad and families apart. A student in London who wants to video-call parents back home can set the call to the family's local evening and be reminded at the right browser moment, without waking anyone at 4 AM by mistake. TimezoneAlarm respects everyone's real clock. Long-distance relationships. When two people live in different time zones, "let's talk at your 10 PM" is a promise that is easy to break with bad arithmetic. Anchor the reminder to your partner's local time and let the extension keep the promise for you. Anyone who watches, trades, books, or follows global events. Live streams, market opens, ticket sales, game releases, and application deadlines are often announced in a foreign time zone. Set the alarm to that zone and be alerted locally the instant it matters. HOW IT WORKS — THREE SIMPLE STEPS Choose a place. Search for any city or country from the built-in database of 140,000+ locations across 214 countries. Set the time there. Enter the hour that matters in that location and pick how it should repeat — once, daily, weekly, monthly, or on a custom interval. Get reminded here. TimezoneAlarm converts the target time to your local time, accounts for daylight saving automatically, and rings on your device with a pop-up and optional sound at the correct local moment. That is it. No spreadsheets, no world-clock apps open in the background, no "wait, is that today or tomorrow for me" confusion. BUILT ON TRUSTED TIME-ZONE DATA Accuracy is the whole point of a cross-timezone alarm, so TimezoneAlarm is built on the IANA Time Zone Database — the same authoritative time-zone data used across the software industry. City and region time zones follow official IANA releases, and daylight saving transitions are calculated per region rather than guessed. That means an alarm set for a city thousands of miles away stays correct throughout the year, including across the spring-forward and fall-back changes that trip up manual calculations and even some calendar tools. ONE ACCOUNT, EVERY DEVICE TimezoneAlarm is more than a browser extension — it is part of a cross-platform product. With optional cloud sync, your alarms and saved cities travel with you across Chrome, Microsoft Edge, Windows, macOS, Linux, Android and the web. Set an alarm before you close your laptop and it is waiting on your phone. Your world clock of saved cities looks the same everywhere, so your setup follows you instead of living in one place. PRIVACY AND PERMISSIONS TimezoneAlarm is designed to do one job well: remind you at the right local time. It asks only for the permissions it needs to store your alarms and cities and to show you notifications when an alarm fires. It is not a browsing tracker and does not exist to collect your activity — it is a focused utility that stays quiet until you actually need it. WHY CHOOSE TIMEZONEALARM Your operating system clock and generic world-clock pages can tell you what time it is somewhere else, but they cannot ring for you at the right local moment for a place across the planet. That gap is exactly where missed meetings, awkward late-night calls, and blown deadlines happen. TimezoneAlarm closes it. It is fast, focused, accurate, and built for people whose lives do not fit inside one time zone. GET STARTED Add TimezoneAlarm to your browser, pick your first city, set the time that matters there, and let the extension handle the conversion and the reminder. Whether you are closing deals across continents, keeping in touch with people you love, planning a trip, or simply refusing to do time-zone math ever again, TimezoneAlarm makes sure the right alarm rings at the right local moment — every time. Set it there. Ring it here.