Smart music players can usually adjust the day of the week through settings. Specific operations can be carried out according to the following steps:

1. Open the settings menu of the smart music player. There is usually a settings button or similar option to access the settings.

2. In the Settings menu, find and select options related to date and time. Different music player interfaces and designs may vary, but usually you'll find a date and time setting option.

3. In the date and time settings, look for the day of the week setting option. Some players may display the day of the week option directly, while other players may display the day of the week along with other date and time setting options.

4. Select the day of the week you want to set. You can change the day of the week by swiping or selecting the drop-down menu. Typically, the day of the week setting will provide options from Monday to Sunday.

5. After completing the settings, save and exit the settings menu. Your smart music player's day of the week settings will be modified.

Please note that different smart music players may have different interfaces and designs, and the above steps are for reference only. If you are using a specific brand or model of smart music player, it is recommended to refer to the user manual of the player or contact customer service for more accurate operating instructions.