Begin your sentence by describing or explaining the events or the significance of the dates you want to list. For example, "The company delivered four shipments."
Place a colon after the description of the event, as in, "The company delivered four shipments:".
List the dates in chronological order after the colon, beginning with any of the following relevant particulars: the time of day, the day of the week, the day of the month, the month and the year.
Insert semicolons between separate dates. "The company delivered four shipments: 5 p.m., March 15, 2009; 4:30 p.m., Aug. 7, 2009; 1 p.m., Nov. 29, 2009; and 8 a.m., Jan. 6, 2010."