26 Sept is Elul 23. 26 Sept after sunset is Elul 24 (debate evening of 26th). Look at what events occurred on those dates:
23 Elul 1656 - 2105 B.C.E.:
On the 301st day of the great Mabul / Flood, Noach opened the window of the Teiva / Ark and sent out the dove for the second time. (see 17 Elul). This time, the dove stayed away all day; "the dove came in to him in the evening, and in her mouth was an olive leaf plucked off; and Noach knew that the waters were abated from off the earth" (Bereishit / Genesis 8:11) (according to Rab' Eliezer)..
24 Elul 3410 - 351 B.C.E.:
Hashem awakened the spirit of Zerubavel and Yehoshua ben Yehotzadok to begin the work of building the Second Beit HaMikdash. (Chaggai 1). The people began clearing the site, hewing wood and cutting stones.
Haggai 1 New King James Version (NKJV)
The Command to Build God’s House1 In the second year of King Darius, in the sixth month, on the first day of the month, the word of the Lord came by Haggai the prophet to Zerubbabel the son of Shealtiel, governor of Judah, and to Joshua the son of Jehozadak, the high priest, saying, 2 “Thus speaks the Lord of hosts, saying: ‘This people says, “The time has not come, the time that the Lord’s house should be built.”’”
26 Sept 2016 or 23-24 Elul are significant dates in Biblical history...