Strength in Numbers…
2 - number of girls who will be seen celebrating of their departures from the womb

27 - the number of years Monix will have graced the Earth with her cheer; also a prime number year for the little tart, which means good luck!

21 - the number Erin won't have to lie about anymore

1 - besides the concept of existence and the loneliest number, the date our celebration will take place

9 - the number of the month and the hour past noon of the soiree

6 - the day of the week of the party

213 - the address

8 - the street

19.21.16.18.5.13.5 20.18.1.4.9.14.7 - the name of the venue, codified as a=1, etc.

1,000,000 - number of one dollar bills Erin flails around in every night before bedtime

answers will appear in the next edition of "american birthdays"

last issues answers:
ox tail soup
never on tuesdays
1566
sebum
72%