http://www.astrologyanswers.com - Zodiacs are defined by dates every month and zodiac signs dates mark the border line on which the signs change.  The people whose birthdays fall on the border dates are called cusps. All zodiac signs have a starting and ending date starting from Aries, which is the first sign of the zodiac. Pisces is the last sign of the zodiac that starts from February and Ends in March.