Within Messianic and Hebrew Roots circles, the issue of the correct calendar comes up often. Many separate over days and times, and perhaps for some legitimate reasons. We know calendar issues were debated in the first century as well. The Qumran sect may have had a solar calendar at one period in the community’s existence. But the Temple seemed to have a calendar most agreed upon. In this article, Tim Hegg looks at the first century and what we can learn from their practice. Hegg looks at various aspects of this issue, and investigates what calendar Yeshua used. If we can determine what calendar Yeshua used, we as disciples of Yeshua should, therefore, keep the same calendar. In conclusion, Hegg suggests we as believers accept Yeshua as our model for the calendar.