Esbat is a celebration of a full moon. It is usually a coven meeting with a special full moon ritual, performed by the high priestess or the high priest. Solitary witches may have their own full moon rituals as well. Some may wrongly believe that esbats and sabbats are the same thing. Well, they aren’t. There are 8 sabbats in a year, all of which are connected to the changes in the nature throughout the year (seasons, equinoxes and solstices) that are commonly represented with a cycle called the wheel of the year. Esbats are celebrated every 28 days or so (every full moon) and there are 12 esbats in a year (sometimes 13, with a blue moon occurring).
5th January 2013 — Last Quarter
11th January 2013 — New Moon
19th January 2013 — First Quarter
27th January 2013 — Full Moon