The Pagan and Wiccan holidays are based upon agricultural and astronomical markers, such as solstices, equinoxes and planting/harvest dates. Some of them are the same each year, and others tend to change, based upon the earth's rotation. Do you need dates so you can plan your 2011 Sabbats in advance? Here's our listing of dates for the eight Sabbats, for both the northern and southern hemispheres.

Image © Rubberball/Getty ImagesImbolc is a festival of fire and light, and in many Pagan traditions, this Sabbat celebrates the Celtic hearth goddess, Brighid. In other traditions, it marks the midpoint between winter and spring. Check here to find out the dates for this year's celebrations.

Image © Sandy Jones/Getty ImagesOstara is the celebration of the spring equinox, and is a time to prepare for the beginnings of new life each year. Find out when it falls where you live, so you can begin your spring celebrations!

Image © Jeff J. Mitchell/Getty ImagesBeltane is a spring celebration that honors the fertility of the earth. It's a time of lust, passion, sex, fire, and abundance. Find out when it falls, so you can plan your festivities!

Image © Matt Cardy/Getty ImagesLitha is the time of the summer solstice, the longest day of the year. Find out when it falls, so you can take advantage of all that magical solar energy!

Image © Getty Images 2008In some traditions, Lughnasadh is a celebration in honor of the craftsman god, Lugh. In others, this Sabbat is observed as Lammas, and celebrates the early grain harvest. Find out the dates for this year's celebration.

Image © Anthony Masterson/Getty ImagesMabon is a time of thanksgiving that celebrates the second harvest, and the autumn equinox. Find out the dates so you can plan your festivities!

Image © Getty Images 2007Samhain is known as the beginning of the New Year in many Pagan traditions. It's a time to honor our ancestors, celebrate the memories of the dead, and embrace the darker half of the year. For many Pagans, it's a season of reflection, divination, and spiritual growth.

Image © Getty ImagesYule marks the winter solstice, and is a time to celebrate the return of the sun back to the earth. Find the dates here so you can plan your celebration.

Image © Getty Images 2008Need the date for something other than a Sabbat? Here's where you'll find our listing of important dates such as moon phases, anniversaries, birthdays and even local events!