This was a good guide last year, particularly for Latin American parades:
http://www.aleida.net/parades-2014-en.html, this year, it does't have all the Queens parades listed.
Here's another site, you'll have to scroll down . . .
http://socialeyesnyc.com/manhattan/nyc-street-fairs-festivals-parades/. Here are some upcoming events in or near JH:
Queens Pridefest June 7, 2014
37th Road between 73rd-77th St
Woodside Festival July 5, 2014
Woodside Avenue between 63rd Street and Roosevelt Avenue
Tour de Queens Bike Tour July 6, 2014 (subject to change)
http://www.transalt.org/biketoursJunction Blvd. Festival August 3, 2014
Junction Blvd. between Roosevelt Avenue and 35th Street
Woodside Festival September 13, 2014
Woodside Avenue between 63rd Street and Roosevelt Avenue
Carnaval de la Cultura Latina 2014 September 21, 2014
Junction Blvd, Corona
http://carnavalculturalatina.com/37th Avenue Festival September 27, 2014
37th Avenue between 83rd Street and 89th Street