Dai Viet Perpetual Calendar App is a free application that helps you quickly and conveniently check the lunar and solar calendars, as well as view good and bad days.

Advantages compared to other day calendar apps: The app provides a daily rating system, making it easier for users to understand how good or bad each day is. In addition, it offers personalized date analysis based on the user’s year of birth, enabling the selection of the most suitable days with higher accuracy.

The calendar is based on Ngọc Hạp Thông Thư, a trusted traditional reference, ensuring accurate and comprehensive content.
It serves as a useful tool for users to personally choose favorable dates and times for important events.

– Date Conversion: Easily convert between the solar (Gregorian) and lunar calendars, helping users look up dates faster.
– Rich Resources: Provides a wide range of traditional rituals, Feng Shui knowledge, and worship guidelines for daily spiritual practice.