Mark your calendars and set your stopwatches! Tickets for Animal Collective's Big Sur show at Henry Miller Library go on sale at noon Pacific time.
The link will appear at noon on this webpage. However, in-the-know Henry Miller Library fans suspect that the tickets will be sold through their Eventbrite page, here. The Arcade Fire show sold out on Eventbrite even before the link appeared on the Henry Miller Library page (that happens when a show sells out in three-tenths of a second), so it's probably in your best interest to go direct to Eventbrite.
Note that according to a commenter on 7 x 7, tickets for Arcade Fire went live for a minute a half-hour early, and half the show sold out then. So start refreshing the page at 11am - maybe you'll get lucky!