‏ Mark 16:2

2And very early in the morning, on the first of the Sabbaths, they went to the tomb, the sun having now risen.
16:2Both Matthew and Mark make a point of calling this Sunday, the first Sabbath, not the first day of the week. This was the first Sabbath of the Christian Faith. All prior Sabbaths, including the previous day, a Saturday, were the Jewish Sabbaths. Also, notice that they set out very early (i.e. before the sun rose), but by the time that they arrived there, the sun had risen.(Conte)
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16:2 The sun being now risen: They set out before it was light, to go to the sepulchre; but the sun was risen when they arrived there. Or, figuratively, the sun here spoken of is the sun of justice, Christ Jesus our Lord, who was risen before their coming.(Challoner)
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