Ka`b bin Malik used to say: "Scarcely did Allah's Apostle set out for a journey on a day other than Thursday."
Related hadith on this topic
Explanation & Benefits
Shaykh Umar Farooq Saeedi
Benefits and Issues:
All days belong to Allah, but Thursday holds special significance because on this day deeds are presented before Allah.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 2605