With Pass: Up to four (4) adults for $5 each. Children under the age of 18 are admitted free.
Open: TIMED TICKET ENTRY ONLY. Wednesday thru Monday, 11 am to 3:30 pm. Saturdays and Sundays, 10 am to 3:30 pm. First Thursdays, 11 am to 7:30 pm. All tickets will be sold for a specific entry time. Please arrive no more than five minutes ahead of your designated time slot.
Closed: Tuesdays. New Year's Day, 4th of July, Thanksgiving, Christmas Eve (open until 3 pm), Christmas, and Patriots' Day. Open: MLK Day, Presidents' Day, Easter, Memorial Day, Columbus Day, Veterans Day.
Please note: A few times a year the Museum opens its doors to the public at no charge. On those days, tickets are distributed to all visitors (including museum pass-holders) until the Museum capacity for the entire day is reached. Patrons are advised to plan accordingly as these days are unusually busy, and call ahead at 617-566-1401.
Link: https://www.gardnermuseum.org/visit/know-before-you-go