The Calendar girls are:
Sharon Cooper: March (Green-gold dress, large Cloverleaf collar)
Trixie Andrews: April (Pink & white Easter Bunny) - Trix Rabbit?? heh
Francine: May (Maypole headpiece, gold entwined in her braids, cream & gold dress with copper and green)
Paulette Rebchuck: June: (White Wedding lingerie, gold ring headpiece, bouquets in both hands)
Evie: July (4th of July. J on her right shoulder, UL on her firecracker headpiece, Y on her left shoulder, Red-White-and-Blue dress)
Sandi Green: August (Baseball mitt headpiece, baseball jersey)
Rhonda Ritter: September (Purple tree costume)
Vicki Hunt: October (Jack-O-Lantern headpiece, Witch cape)
Lucy: November (Pilgrim Thanksgiving outfit, Horn-of-plenty headpiece)
Stephanie Zinone: December (Christmas tree dress with DECEMBER on the hem)
Donna Singer: January (Champagne glass outfit with foam legs sticking from it, red sparkly dress)
Dallace Winger: February (Wiggling George Washington-face costume)