Gardner Dozo Is

The Deaths in 2018 site lists under May 27:

Gardner Dozois, 70, American Hall of Fame science fiction writer (Morning Child, Hunter's Run) and editor (Asimov's Science Fiction), Nebula Award winner (1984, 1985), infection.^{[3][better source needed]}

Note the cryptic phrase in his name re “Gardner dozo is”... and it speaks volumes.  

• Gardner Dozois (July 23, 1947 – May 27, 2018) 

My mother passed away on his birthday... AND the date cropped up in my previous post, note the following:

• Aaron Jameer Dobson (born July 23, 1991) 
• Adam Dobson (born 23 June 1986) (dam)

• John Robert Buczkowski (May 5, 1964 – May 23, 2018) 54, football

• 1999 – Hugh Casson (23 May 1910 – 15 August 1999)English architect and interior designer (hug)

And so the cluster expands: “May 23(x2), June 23, July 23(x3)/ 23rd Day, Month Sequence” pattern-cluster.