It sounds a bit odd to a native English speaker: “Suit-up Day”. A funny mix of “dress up” and “suit”, which doesn’t really work. Still, it’s better to “suit up” than to “shut up”. It looks like Áedán and his colleagues had fun dressing up. After all, 11th November is regarded as the beginning of Carnival in Zurich, and what better than dress up like “captains of industry” in these times of financial crisis?