Alright. This is probably not worth much, but I looked at calendars for when each of the dates falls on a Monday to see if there is anything relevant there.
August 10: happened in 2015 and will happen again in 2020. September 2nd is a Wednesday, October 11 is Sunday, November 26 is Thursday, and December 6 is Sunday. Tuesday, Friday, and Saturday are not used.
September 2: happened in 2013 and will happen again in 2019. August 10 is Saturday, October 11 is Friday, November 26 is Tuesday, and December 6 is Friday. Sunday, Wednesday, and Thursday aren’t used.
October 11: happened in 2010 and will happen again in 2021. August 10 is Tuesday, September 2 is Thursday, November 26 is Friday, and December 6 is also a Monday. Wednesday, Saturday, and Sunday aren’t used.
November 26: happened in 2012 and will happen again in 2018. 2012 was a leap year so August 10 was Friday, September 2 was Sunday, October 11 was Thursday, and December 6 was Thursday. Tuesday, Wednesday, and Saturday weren’t used.
For 2018, August 10 will be Friday, September 2 will be Sunday, October 11 will be Thursday, and December 6 will be Thursday. Tuesday, Wednesday, and Saturday weren’t used.
December 6: happened in 2010 and will happen again in 2021. August 10 is Tuesday, September 2 is Thursday, October 11 is also Monday, and November 26 is Friday. Wednesday, Saturday, and Sunday aren’t used.
Pretty sure none of this means anything though.
EDIT: I looked for significant space things on these dates because of the theme of the last fragment.
August 10, 1932: an 11 lb meteorite landed in Missouri
August 10, 1990: Magellan probe reached Venus.
September 2, 1752: UK adopts Gregorian calendar.
September 2, 1970: NASA cancelled Apollo 15 and Apollo 19.
October 11, 1582: Date doesn’t exist in Italy, Spain, Portugal, or Poland due to changing to the Gregorian calendar.
October 11, 1957: MIT calculated Sputnik 1’s booster rocket orbit.
October 11, 1958: NASA launched Pioneer 1 that then fell back to Earth and burned up.
October 11, 1968: NASA launched Apollo 7, which was the first successful Apollo mission.
October 11, 1984: Kathryn Sullivan on the Challenger became the first woman to do a spacewalk.
October 11, 2000: NASA launched the 100th space shuttle mission.
November 26, 1965: France launched a rocket with its first satellite onboard.
November 26, 1977: Someone named Vrillon took over Britain’s southern televesion for six minutes starting at 5:12pm. He said he was from Ashtar Galatic Command.
November 26, 1990: Delta 2 rocket’s first flight.
November 26, 2003: France’s Concorde jet that flew at twice the speed of sound made its final flight.
November 26, 2011: Mars Science Laboratory launched the Curiosity Rover.
December 6, 1997: A Russian cargo plane crashed and killed 67 people.
December 6, 2005: An Iranian military transport plane crashed. It killed 44 people on the ground and all 84 people on board.
December 6, 2006: NASA revealed the photos from Mars Global Surveyor that suggested liquid water on Mars.