San Francisco Celebrates May 13 as “Flowers In Your Hair Day” and Kicks Off Summer of Love Celebrations Mon, 05/15/2017 - 12:42 — afinke Surprise and Delight for Travelers at SFO and United Airlines Flight #1967 Language English Tags: summer of love50th Anniversary of the Summer of Lovesan franciscoSFOunited airlinesmadame tussaudsSan Francisco Gay Men's ChorusFlowers in Your Hair DayShare Your Lovetraveleventsactivities