From the Lady Bird Johnson Wildflower Center Site:

We’re staying open late to make more hours for wildflowers! Make it a date night, a picnic with friends, or come for some solo solace in nature. Each evening will feature live music from local musicians, a rolling lineup of Austin’s favorite food trucks, and take-and-walk adult beverages for purchase. We’ll release more details as the event date draws closer.

Tuesday Twilights are included with regular garden admission. Reservations are encouraged and become available seven days in advance.