In language, initial capitals should always be used in all the words that are part of a proper noun, this includes the names of companies, historical periods, institutions, territories, special occasions or events, etc. This implies in the sentence presented, "freshman orientation week" should be capitalized as "Freshman Orientation Week" because this refers to a special occasion or event and therefore it is a proper noun. Also, others such as bold letters are only used in the case the writer wants to emphasize a section of the text and italics are used in the case of words or phrases in other language or to emphasize words, which is not the case of the sentence presented.
