The link you followed will bring you to this page:

https://www.facebook.com/events/1377789865925096?acontext=%7B%22event_action_history%22%3A[%7B%22extra_data%22%3A%22%22%2C%22mechanism%22%3A%22your_upcoming_events_unit%22%2C%22surface%22%3A%22bookmark%22%7D%2C%7B%22extra_data%22%3A%22%22%2C%22mechanism%22%3A%22your_upcoming_events_unit%22%2C%22surface%22%3A%22bookmark%22%7D]%2C%22ref_notif_type%22%3Anull%7D