The 2023 perpetual calendar is a utility that helps you quickly, accurately and completely look up information about a date so that you can make the right choice for the job.

In the process of compiling, we have used only one source, the book NGOC HAP THUONG by Hua Zhen Quan, so there may be some slight differences compared to other applications on the market, but we are committed to being informed. accurate information from the book without further fabrication. However, because the text of the book is somewhat technical and difficult to understand, we have tried to put our understanding to try to explain it in the hope that there will be clearer information and will update more for you. subsequent versions.

The perpetual calendar has no time limit on the lookup, which means you can look up any date in the past including the future.

SIMPLE, COMPACT, EASY but ACCURATE and COMPLETE, that is the consistent criterion that we always follow rigorously so that Lich Van Nien 2023 will serve you better and better.