Âm Lịch

A Vietnamese lunar calendar (Âm Lịch) web app built with Flutter.

Features

• Solar (Gregorian) and Lunar date conversion
• Moon phase visualization for each day
• Can Chi (Heavenly Stems & Earthly Branches) for day, month, and year
• Auspicious hours (Giờ Hoàng Đạo) with zodiac icons
• Month calendar view with lunar day numbers
• Solar/Lunar focus toggle
• Dark (celestial) and Light theme
• Swipe gestures for day and month navigation
• Download .ics calendar file for any decade

Download Lunar Calendar (.ics)

You can download the Vietnamese lunar calendar as an .ics file and import it into Google Calendar, Apple Calendar, Outlook, or any calendar app:

1. Open amlich.demen.org
2. Navigate to the year/decade you want
3. Click "Tải Âm Lịch 2020s" (or whichever decade is shown) at the bottom
4. Import the downloaded .ics file into your calendar app

The file is generated client-side from the app's lunar conversion algorithm and covers a full decade (e.g. 2020-2029). Each day includes the lunar date, Can Chi, and moon phase info.

URL Parameters

You can open the app with a specific date using the date query parameter:

https://amlich.demen.org/?date=10-02-2024

Format: dd-MM-yyyy (day-month-year)

Getting Started

flutter pub get
flutter run -d chrome

Deployment

Deployment is automated via GitHub Actions. Every push to master builds and deploys to amlich.demen.org.

To build manually:

flutter build web

License

BSD