Hello everyone, I have just completed a small web app to view the Vietnamese Calendar with the desire to create a daily calendar viewing experience that is both visually pleasing and quick.

Why should you try this web app?

• 100% Accurate: Uses the astronomical algorithm of Dr. Ho Ngoc Duc (calculated based on the lunar phase and the position of the sun), ensuring absolute accuracy for the period from 1900 to 2100.

• Super fast: Loads extremely lightweight, instantly showing today’s information.

• Modern interface: No ads, colors change flexibly each day for a fresh feel.

• Enough necessary features and additional useful features that other calendar apps do not have: 
  - Full month view mode with information on day Can Chi, holidays, and visual auspicious and inauspicious times.
  - Lookup, convert from Solar Calendar to Lunar Calendar and vice versa with just one tap.
  - See which week of the year we are in (Week No.; Which week is it)
  - Countdown to the nearest holiday 🎉
  - The app has a dark mode and flexible language switching between Vietnamese and English.

• Differentiation: Not only does it show the date and time, each day, the app also integrates explanations about Solar Terms, interesting knowledge, or a “little secret” reminding you to drink water, stretch... to take care of yourself amidst busy work.

• 📱 Easy installation (PWA): You can add the app directly to your phone's home screen (Add to Home Screen) for smooth usage like a real app without taking up space.

This is a small gift I dedicate to the community, hoping it will assist everyone in looking up the Lunar - Solar Calendar daily in the most gentle and positive way.

Although there are currently many similar web apps, my app is optimized for user experience and scored A+ absolutely in technical performance on ScoutQA.

We invite everyone to experience the application at: https://www.lichvn.id.vn