25 Elul 5776
From The Book of Our Heritage by Eliyahu Kitov:
The twenty-fifth of Elul is the day on which the world was created - according to R. Eliezer, whose opinion we follow as concerns the calculation of the calendar. That day, on which Heaven and earth were created, preceded the creation of Adam by six days, for Adam was created on Rosh Hashanah.
In some communities it is customary, between the twenty-fifth of Elul and Rosh Hashanah, to read the verses in Bereshit that recount the days of Creation.
On the twenty-fifth of Elul, Nechemiyah completed construction of the wall surounding the city of Jerusalem, as the verse states: (Nechemyah 6:15) "And the wall was completed on the twenty-fifth of Elul."