Aswad bin Qais narrates from his father that he said: "Umar bin Khattab (may Allah be pleased with him) heard a traveler saying, 'If today were not Friday, I would have set out on my journey.' So Umar (may Allah be pleased with him) said: 'Set out on your journey, for Friday does not prevent a person from traveling.'"
Hadith Referenceمسند الإمام الشافعي / كتاب الجمعة / 458