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The Heavenly Stems and Earthly Branches (Ganzhi) dating system is a traditional Chinese chronological method that has been in use since ancient times. "Ganzhi" is the collective term for the Heavenly Stems (Tiangan) and Earthly Branches (Dizhi). By pairing the stems and branches in sequence, a complete cycle of sixty is formed. This cycle repeats endlessly, creating what is commonly known as the "Ganzhi Table." In the Ganzhi calendar, each new year begins at the Start of Spring (Lichun). In modern history, the Ganzhi dating system has rarely been used in everyday calendars. However, throughout the long course of history, this system has never disappeared. The Ganzhi calendar has its own unique way of representing time, distinct from the Gregorian calendar. We hope this pure Ganzhi calendar tool will help revive the important role of this ancient timekeeping system as part of the broader renaissance of Chinese cultural heritage.