The summer solstice–the longest day of the year–happens this weekend; it’s a perfect excuse to go a little bit crazy, (literally) climb the walls, and make a (long) day and night (or two) of it.

Times Square

Solstice Yoga in Times Square
You’re invited to find tranquility and transcendence in the midst of the world's most commercial, frenetic and urban place as thousands of yoga enthusiasts gather for a collective ohm on the longest day of the year. Celebrate the sun, summer and creativity with five free outdoor yoga classes, gift bags, free yoga mats and more at this all-day yoga festival.
Friday, June 21; 7:15AM-9PM
Broadway between 43th and 48th Streets
Free; pre-registration required

Battery Park City

Swedish Midsummer Festival
At the annual Swedish Midsummer Festival in Battery Park City in lower Manhattan, adults and children can picnic in the grass, decorate the midsummer pole, make flower wreaths, play traditional games and dance to authentic fiddle music. Some of New York's finest Scandinavian restaurants and food purveyors will host food stands offering Swedish picnic-style delicacies.
Friday, June 21; 5-8PM
Robert F. Wagner Park, Battery Park City in lower Manhattan
Free

Upper East Side

Adventures NYC in Central Park
Join NYC Parks and Backpacker magazine for Adventures NYC, and hike, bike, climb and paddle to celebrate NYC Parks and the great outdoors. Activities will include the North Face Zone, the L.L.Bean Aquatic Zone–featuring kayaking, fly casting and paddleboarding,–the Bear Naked Climbing Zone. a mountain bike expo, health and fitness clinics, live music and more.
Saturday, June 22; 11AM-4PM
Central Park Bandshell Area (enter at 72nd Street)
Free

Chelsea

3rd Annual Adorama Street Fair
Camera retail king Adorama has been throwing this street fest for three years now, and its popularity continues to grow. Street fairs may be ubiquitous, but how many of them showcase the newest and best in camera equipment and electronics? And how many offer a petting zoo and New York Giants football stars?
Sunday, June 23; 10AM-4PM
18th Street between 5th and 6th Avenues
Free
City-wide

The Coney Island Mermaid Parade
Refusing to be beat by Hurricane Sandy–and thanks to a Kickstarter campaign and thousands of supporters, the city’s wackiest marchers, float riders, performers and other creative types don glitter, greasepaint and loads of creativity and make their way triumphantly down the shore.
Saturday, June 22, 1 PM
Coney Island; parade starts at West 21st Street and Surf Avenue, see site for route and events
$Free

The Beach at Governor’s Island Full Moon Party
Celebrate the solstice by hitting the beach. On the evening of Saturday, June 22, Governor’s Island will be the site of a laid back dance party featuring live music on two stages, DJs and a sunset over the Statue of Liberty.
Saturday, June 22, 4PM to Midnight
Governor’s Island on New York Harbor; see site for transportation and ticket info
Tickets: $35 and up (for VIP Tickets)

Thrillist’s Best Day of Your Life
City guide site Thrillist wants to make sure the longest day of the year is a memorable one with a socially-connected map full of fun events throughout downtown Manhattan from free coffee to sunset drinks on the Hudson.
Friday, June 21
City-wide, see site for locations and details

Make Music New York 2013
This annual live, free musical celebration will provide a citywide soundtrack to the longest day of the year, with over 1,000 concerts on streets, sidewalks, and parks across the five boroughs.
Friday, June 21, citywide; see site for locations and events and how you can participate.