The Ed Whitlock thread would have been started on or around October 16, 2016, right after Ed ran the Toronto Waterfront marathon in under four hours, at age 85.
From Wikipedia:
After turning 80, Whitlock improved the marathon world record for his age category by almost 15 minutes to 3:25:43 at the 2011 Rotterdam Marathon on April 10, 2011.[7] He then further improved on his age category world record at the Toronto Waterfront Marathon on October 16, 2011, lowering the record to 3:15:54.[8]
At age 81, on Sunday, September 16, 2012, wearing bib number 1, Whitlock broke the Canadian and unofficial world half-marathon record at his hometown inaugural race, the Milton Half-Marathon, running 1:38:59.[9] In 2013, he lowered the record to 1:38:11 on the same course.
Whitlock also competed on the track, where as of 2012 he held 15 world age group records ranging in distance from 1500 metres to 10,000 m and age groups 65+, 70+, 75+, 80+ and 85+, as well as the three age group marathon records 70+, 75+ and 80+.[10]
On October 16, 2016, Whitlock, aged 85, ran the Toronto Marathon in 3:56:38, setting a new world record.[11]