Hi gmusik,

this is nice and easy
Using MM_DAY_OF_WEEK will return the day of week, 0=Sunday, 6=Saturday

if (MM_DAY_OF_WEEK == 1)  return 101;
if (MM_DAY_OF_WEEK == 2)  return 102;
if (MM_DAY_OF_WEEK == 3)  return 103;
// etc.

Replace 101, 102, 103 etc with the module ids of the module to display for each day, as appropriate.
Remember to set up the target modules (101, 102, 103 etc, whatever the ids are) to NOT show on any menu items. In that way they will still show up when included by the code above, but won't show up otherwise. (and that's the way you want it!)

Best regards
Stephen