Its again the period for Taoists to prepare for Tian Kuang Day (天貺日) or so-called the Opening of Heavenly Gate (天門開).
This Year, Year 2011, it falls on 06 July (a Wednesday) and some will celebrate on the 7th Day of Lunar 6 Month - which is 07 July.
For more info on Tian Kuang Ri, you all may proceed to the following links:
Intro on Tian Kuang Ri: http://javewu.multiply.com/reviews/item/199
Things to take note Tian Kuang Ri: http://javewu.multiply.com/reviews/item/389