Buffy Summers' birthday was the date of Buffy's birth. Most of her birthday celebrations since her arrival in Sunnydale were followed by supernatural events.

Occurences

• The loss of Angel's soul and the return of Angelus^[1][2]).
• Buffy being stripped of her Slayer powers in preparation for the Cruciamentum^[3].
• Rupert Giles being transmogrified into a Fyarl demon by Ethan Rayne^[4].
• Dawn Summers' discovery that she is the Key and subsequent identity crisis^[5].
• All of the participants of Buffy's birthday party, including anyone else who entered the house, being trapped inside the Summers residence by Dawn Summers' unwitting wish to Halfrek^[6].

Behind the scenes

• Whenever Buffy's birthday was celebrated on-screen, it was always during the twelfth or thirteenth episode of the season.

References

1. ↑ "Surprise"
2. ↑ "Innocence"
3. ↑ "Helpless"
4. ↑ "A New Man"
5. ↑ "Blood Ties"
6. ↑ "Older and Far Away"