What were the disciples thinking on the Sabbath day? Jesus' body was lying the in the tomb of a rich man. By tradition, and conviction they can do nothing but wait. Some of the women had already prepared spices and materials to finish ministering to Jesus' body. Ultimately, there is nothing else to be done. It is the Sabbath. Do they go and worship at the temple? Do they stay sequestered in their rooms?
Sometimes the interval of time between what seems to be the end of a dream, and the place where God intervenes is the hardest place to maintain faith. We pass this day by easily without much thought because we know the end from the beginning. By the second day maybe shock has worn off and grief has overwhelmed? Try to put yourself in the sandals of the disciples on this day of anticipation and waiting.