Lich Van NienLich Viet is a free calendar app for Android that provides comprehensive information about the lunar calendar, including the calendar day, negative and positive history, information day, hour zodiac, black religion, exodus, so good, why bad things to do, and so taboo in the day. The app's functionality includes a calendar day, calendar month, the ability to change the date, and facts. Additionally, users can add events to specific dates and even set up events to repeat daily, monthly, or yearly. The app syncs with Google Calendar, making it easy to keep track of important dates. Overall, Lich Van NienLich Viet is a great resource for anyone looking to stay informed about the lunar calendar and its significance.