Costco honoring military with shopping event. More than 100 Costco stores across the country will host a special shopping event for Veterans, active duty military and their families on March 24th. The Military Hour will be a private early opening of the store and will feature freebies, samples and product demonstrations. You need to RSVP online and have military I.D. to get in. You do not need to be a Costco member to attend but you must have a membership to buy anything. The retailer is offering a special military membership online as well. CLICK HERE for more info.