For the Extraordinary Form, you can go to the following site and select the desired day from the calendar: virgomaterdie.com (after January 1, change the year in the URL).
Or you can see a liturgical calenday for the current week for both forms of the Mass side-by-side with links to the readings and other information at catholocity.net For previous weeks, see the archive section above the calendar.
(a) I would create a new topic for each week or month, not each day. The daily postings for the week or month will go in the same topic. This will keep the forum from getting too cluttered.
(b) Create each day's post as a reply to the topic post rather than to the previous day. This will help keep and discussion chains clear and the list readable for those who view in threaded mode.