What do priests wear during the liturgical year?
That depends on what they're doing. A priest normally wears a
cassock or a black suit with clerical collar for his street wear.
In church he would normally wear a cassock and a surplice. For some
liturgical functions, he wears a stole and cope, for others, just a
stole over his cassock and surplice. For Mass, he wears an alb over
his cassock, with a stole, maniple, and cincture. Over all of that,
he puts on a chasuble. His stole, maniple (if he is wearing one)
and chasuble are all the color of the day, or sacrament that he is
celebrating.