Mark 6:1 marks the first time that Jesus returns to Nazareth after having left sometime earlier (see Mark 1:9). During his ministry in Galilee he was known as Jesus of Nazareth (Mark 1:24), to distinguish him from all the other Jewish men also called Jesus. We do not know how long he spent in the towns of Galilee before going back home for the first time. Including the forty days in the desert (Mark 1:13), there were at least four additional Sabbath days (Mark 1:21, Mark 1:39; Mark 2:23; Mark 3:1) before he went home. He was thus away for a minimum of at least three months, most likely closer to five or six months. The precise time is not important.