The default format of sunday's transfer label includes the following elements:
The mention "sunday*".
The date in the format "ddMM" (or "MMdd" depending on your country) corresponding to the day when the revenue was generated.
A portion of your establishment's name.
Example: "sunday*0609myestablishment"
This label can have up to 23 characters, but it's important to note that some banks or accounting software may only consider 6 to 10 characters in some cases.
If you wish to modify it, you can make a request through sunday's support. Please keep in mind that the number of characters is limited.