General Vietnamese Calendar application: close, accurate with many unique functions: - You can view the lunar calendar, the positive calendar, the hour chi, day, month and year - See the good day, good time, the right time and time to perform the work based on Mai Hoa Dich Ly, Ngu Hanh Hanh etching, ... - Sow hexagrams, padded hexagrams according to I Ching - Keep track and remind the days to remember, public holidays and important days related to individuals - Keep track of circadian rhythms a