Some thoughts on Word and Communion services on weekdays:
[166.] Likewise, especially if Holy Communion is distributed during such celebrations, the diocesan Bishop, to whose exclusive competence this matter pertains, must not easily grant permission for such celebrations to be held on weekdays, especially in places where it was possible or would be possible to have the celebration of Mass on the preceding or the following Sunday. Priests are therefore earnestly requested to celebrate Mass daily for the people in one of the churches entrusted to their care.
The first pastor who employed me full-time predicted that to address the clergy shortage, we would have megaparishes with “Sunday” Mass every day. Come on a weeknight or weekend–it wouldn’t matter. A pragmatic solution that rather concedes the special quality of Sunday.
Catholic Sensibility 