DaSjaj'e' maSuv

on *monday* we fight

Meaning of all the days of the week, monday is the day we'll fight.

Would you use it? Does anyone see anything against it?

Personally I see no problem, since {DaSjaj} is a noun to begin with, and there's no rule prohibiting the placement of the emphatic {-'e'} on a noun acting as a time stamp.