February 2012 - Between Jan 30th and Feb 15th
June 2012 - - - - Between June 30th and July 15th
October 2012 - Between October 30th and November 15th
December 2012 Between December 30th and January 15th 2013
Please keep in mind these dates are all approximate and are compiled through the use of divination, crystal balls and tarot cards since Google never releases this information. Until then, build your backlinks on quality blogs, sit back, relax and have a drink, everything will fall into place in it's own time.