Calendar+
A free, beautifully designed calendar app built for everyone — powerful enough for professionals, simple enough for everyday use.
What is Calendar+?
Calendar+ is a full-featured, browser-based calendar application that works entirely on your device — no account, no installation, no subscription required. Open it in any modern browser and start using it immediately.
We built Calendar+ because we believe a great calendar should be fast, private, and accessible to everyone. Whether you want to track personal events, find out when the next public holiday is, look up moon phases, or just know what day of the week a date falls on — Calendar+ has you covered.
Features
Supported Countries & Holiday Calendars
Calendar+ algorithmically computes public holidays and cultural festivals for the following 10 countries. Dates are calculated fresh each year using mathematical algorithms — they are not stored in a lookup table, meaning Calendar+ works accurately from 1970 all the way through 2099.
Holiday computation uses established algorithms: the Anonymous Gregorian Easter computus, Jean Meeus lunar phase equations, the Islamic tabular calendar, Japanese equinox formulas, and the Chinese lunisolar calendar. Lunar-based festival dates are accurate to ±1 day of the officially declared date.
How It Works
Calendar+ runs entirely in your browser. When you open the app, all calendar logic, holiday computation, and rendering happens locally on your device — no data is sent to any server.
Your data is saved in your browser's localStorage, which means:
- Your events and preferences are available immediately every time you open the app
- No internet connection is required after the page loads
- Only you have access to your calendar data — we never see it
- You can export everything at any time using the Export button (generates a standard .ics file)
The Weather feature fetches live data from the Open-Meteo API, a free and open weather service. No API key or account is required. Weather data is fetched only when you search for a city or use your location.
Our Approach to Privacy
The only external service loaded by the main calendar page is Google Fonts (for the Inter typeface). The weather page additionally contacts the Open-Meteo API and, when using "My Location", OpenStreetMap's Nominatim service for reverse geocoding. Neither service requires login or stores personal identifiers.
For full details, please read our Privacy Policy.
Technology
Calendar+ is built with plain, dependency-free web technologies. No frameworks, no build tools, no node_modules — just HTML, CSS, and JavaScript running directly in the browser.
The use of ES5-compatible JavaScript means Calendar+ works across a wide range of browsers and devices without any transpilation or polyfills.
Our Mission
The goal of Calendar+ is simple: give everyone a fast, reliable, and private calendar tool that works anywhere, without asking you to create an account or give up your data. We believe that a calendar is a personal tool, and personal tools should stay personal.
We are committed to keeping Calendar+ free forever, continuously improving holiday accuracy, adding useful features, and respecting user privacy above all else.
Contact Us
We welcome feedback, bug reports, and suggestions. Reach out to us any time:
General enquiries: info@thesuccessway.in
Privacy & data: privacy@thesuccessway.in
Legal matters: legal@thesuccessway.in
Website: timeanddate.thesuccessway.in