A wedding was delayed and pushed off a day or 2 because of a snow storm. Is there a problem of dam chimud because the date of the wedding now changed?
No, there is no problem.
Sources: See Rema 192:2; Levush 192:2; Mekor Chaim 192:12; Aruch Hashulchan 192:10. Even lechatchilah, it is permitted to complete the shiva nekiim up to four days before the wedding, because we are not concerned that during these days, when the parties are busy and worried about preparations for the wedding, for dam chimud. The same would apply for the two days of delay.