Science Solstice Sunday

Science Solstice Sunday logo

Each year, the Smithsonian marks the official beginning of summer —the Solstice — by hosting weekend programs and performances throughout the day and night.

Celebrate the start of summer with our free, family‑friendly Science Solstice Sunday, part of the Smithsonian’s annual Solstice Weekend! 

Follow animal clues in an interactive scavenger hunt across the Zoo for a chance to win a prize, enjoy special animal demonstrations, and explore hands-on activity stations from Smithsonian scientists, researchers, and experts working around the world to protect wildlife and study nature, including:

  • Smithsonian Tropical Research Institute, which works with tropical ecosystems and studies wildlife in Panama
  • Smithsonian STARS program, which connects rural classrooms to the cosmos through telescopes, educational programs, and more
  • Wildlife Health Sciences, which supports veterinary care and health 
  • EEHV Lab, a worldwide resource of disease information, testing and research for the global elephant community
  • Department of Nutrition, which creates diets for the animals
  • Population ecologists, who work to improve Zoo reproduction outcomes
  • Center for Conservation Genomics, which uses advanced genetic tools and DNA testing to manage endangered species
  • And more!

Know Before You Go

  • There is no special ticket to this event. Just come to the National Zoo!
  • All guests, including children under 2 years old, must have an Entry Pass to enter the Zoo. Entry Passes are free and can be booked on the Zoo's website.
  • To help our staff scan Entry Passes efficiently, all members of your party should plan on entering the Zoo together.
  • Please have your Entry Pass QR codes ready to scan when entering the Zoo.
  • Members can walk through the Zoo’s pedestrian entrances without reserving Entry Passes. Simply present your ID along with your membership card on your phone or provide a copy printed from home.
  • Daily parking is not included with Zoo admission. If you plan to drive and park at the Zoo, you can pay a flat-rate parking fee of $30 per vehicle in advance/$40 day-of. Due to the popularity of the Zoo in summer, we recommend you purchase your Parking Pass online before your visit.
  • Drivers should plan to enter through the main vehicle entrance at 3001 Connecticut Ave, NW.
  • Member parking benefits may be used for this event. Member Parking Passes must be reserved in advance online; they cannot be redeemed on-site. Become a Member today!
  • All Parking Pass purchases are non-refundable, and exchanges are subject to availability.

Visit our Accessibility page for information on how we provide inclusive experiences for all audiences. Please ask for assistance at the Visitor's Center or the Information Station near Lion-Tiger Hill after entering the Zoo. 

  • Wheelchairs, electronic convenience vehicles (or "scooters"), strollers, and wagons are available to rent at both locations.
  • A photo ID or driver's license from the U.S. or other country of origin is required for all rentals. Passports are not accepted for security and safety concerns. Operators must be 18 years or older.