Since the meeting day was moved, it might be the time of the meeting was changed; and the meeting DATE would definitely have been changed.  So, this would be a great opportunity to clarify exactly what date and time the meeting was - and eliminate confusion completely.

I have been known to mismatch the day and date of a meeting in the past.  By communicating both day AND date, it has given others an opportunity to be clear about when the meeting is, and to correct me when I have the wrong day with the wrong date.     :)