Synopsis: The first calendar in Hawaiæi was published in 1835 with a Hawaiianization of the Georgian Calendar system, which is a solar calendar. In 1864, in “Christian Calendar,” the night counting system (Pöæakahi, Pöæalua, etc.) that we see today was added. The Hawaiian ancient calendar used lunar phases. Hawaiian and Christian calendars have some similarities. Where did the night counting system in the Christian calendar come from?