I was not playing Spiral Knights when the Homecoming Celebration event came around but I've seen the Honor gear displayed on the wiki. (I have them bookmarked too XD)
Different variations of the gear were given to players who logged on during this event based on what rank they were at the time. Recruits, Apprentices and Squires got the Honor Blade, Honor Guard, and the Recruit's Battle Stand. Soldiers, Knights and Knight Elite's recieved the Tempered Honor Blade, Great Honor Guard, and the Knight's battle stand. Defender's, Defender Elite's and Champion's obtained the Ascended Honor Blade, Mighty Honor Guard, and the Champions Battle Stand. Finally, Vanguard's attained the Lionheart Honor Blade, Exalted Honor Guard, and the Vanguard's Battle Stand.
I find it a little unfair that players like me who joined the game after the event didn't recieve any of these items or something similar to them. The items are not tradeable or auctionable. How is a player to obtain these items and other like event items if they weren't there for the event? Surley, that's a ridiculous question and I will most likley be shunned for it but I seriously want to get my hands on that gear!
It's only cobalt line reskins, pretty but not really useful. Maybe someday in the future SK will have an event like this but who knows. Till then the only way to get these things is doing something that would get you perma-banned.