Eventbrite syncs up with Facebook events. When I worked at an event venue I ran tickets through both. More avenues just mean more options for conversions. Advertising time somewhat depends on the event attendees expectations. Are they locals looking for something to do on a Friday night? Tourists coming into town that will only be there a certain period of time? People that will be traveling specifically for this event? For locals and lower ticket prices I generally did 3 months out. Tourist based events (I work in a SWFL beach town) we'd do 6-8 months but increase budget 3-4 months and day prior. Events people would be traveling for 8 months out, increase budget 4-6 months, decrease geographical targeting as event gets closer (as people are less likely to make plans to travel, and increased budget in decreased space will increase visibility) If these are likely to be repeat customers (like local residents) I would also recommend doing a venue targeting campaign. It will tag the IP address of the phones (or laptops) that come into the area of the event and you can retarget them with ads for up to 6 months so you'd be able to reach them with new show information without having to have them register for an email list.
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