Seasons of the Witch, Vol. 1 (Charmed)

Samhain: 10/31, or Halloween -- traditionally a time to reflect, a time of divination, and a time to honor the ancients. But Phoebe's plans to communicate with her ancestors are cut short when she's recruited to help reunite a star-crossed, magical couple.

Yule: 12/22, or the winter solstice, and the longest night of the year. And when Paige enters an all-night party at a local club, she finds herself at the center of an evil plot to bring about permanent midnight.

Imbolc: 2/1, a time when the earliest hopes for spring are fostered and seeds are planted for dreams of the coming summer months. But Piper can't look toward the future -- and having children with Leo -- when her half-whitelighter, half-witch sister's powers are on the fritz. Is a hybrid baby destined for doom?