From Facebook Developer Wiki

Note: When making API calls, use the integer value to identify the category (event_type)/subcategory (event_subtype), not the string name.

Event Categories

• 1: Party
• 2: Causes
• 3: Education
• 4: Meetings
• 5: Music/Arts
• 6: Sports
• 7: Trips
• 8: Other

Event Subcategories

• 1: Birthday Party
• 2: Cocktail Party
• 3: Club Party
• 4: Potluck
• 5: Fraternity/Sorority Party
• 6: Business Meeting
• 7: Barbecue
• 8: Card Night
• 9: Dinner Party
• 10: Holiday Party
• 11: Night of Mayhem
• 12: Movie/TV Night
• 13: Drinking Games
• 14: Bar Night
• 15: LAN Party
• 16: Brunch
• 17: Mixer
• 18: Slumber Party
• 19: Erotic Party
• 20: Benefit
• 21: Goodbye Party
• 22: House Party
• 23: Reunion
• 24: Fundraiser
• 25: Protest
• 26: Rally
• 27: Class
• 28: Lecture
• 29: Office Hours
• 30: Workshop
• 31: Club/Group Meeting
• 32: Convention
• 33: Dorm/House Meeting
• 34: Informational Meeting
• 35: Audition
• 36: Exhibit
• 37: Jam Session
• 38: Listening Party
• 39: Opening
• 40: Performance
• 41: Preview
• 42: Recital
• 43: Rehearsal
• 44: Pep Rally
• 45: Pick-Up
• 46: Sporting Event
• 47: Sports Practice
• 48: Tournament
• 49: Camping Trip
• 50: Daytrip
• 51: Group Trip
• 52: Roadtrip
• 53: Carnival
• 54: Ceremony
• 55: Festival
• 56: Flea Market
• 57: Retail
• 58: Wedding