Hi Rebecca!
Event Aggregator will let you pull events from Facebook into your website, but there is not currently a way to publish events from your website to Facebook.
If this is a feature that you would like to see added in the future, please do let us know over in our Feature Ideas Forum! This is what we use to gauge user interest in new features and help guide future development efforts.
We do offer full refunds within 30 days of purchase, so if you’d like to take Event Aggregator for a test run, feel free to do so! Please let me know if you have any additional questions.
Thanks,
Jennifer