You don’t say if you are male of female, so here goes.
Consider what people wear in your area to Mass on Sunday. that is a starting point.
Really loud colors might be something to consider; they can be distracting - but if that is the best you have, then wear it.
For men, a suit and tie would be appropriate in some areas (as inm likely east of the Rockies!) I live in Oregon, and a suit and tie is a rarity out here. Jeans would normally be inappropriate even here, but for some people, a new pair might be the best they have.
Out here, a time is unlikely; but a button down shirt would be appropriate.
A dress is fine if you are female; but a party dress might not - not that party dresses are automatically immodest - many are not; but something simple is fine. A skirt and blouse would also seem appropriate, of modest length (and I will let you figure that one out); again something you might wear to work which looks professional.
Simple always works.