Festival city - Ottawa is full of annual outdoor events that celebrate different genres of music, as well as food, tulips, dragon-boating, gay pride and virtually every other aspect of culture. While we’re watching for lineup announcements for the major music festivals (Bluesfest, CityFolk, Ottawa Jazz Festival, Chamber Music Fest, Music and Beyond) we can’t help but notice that others are celebrating landmark years: It’s the 40th anniversary of Winterlude (Feb. 2-19), the 25th Dragon Boat Festival (June 21-24) and the 15th Westfest (June 8-10). Westfest, by the way, has already nabbed Canadian rock heroes The Pursuit of Happiness as