“He was hanged the same week that Tehran executed a group of militants, a year after Iran agreed to a landmark accord to limit uranium enrichment in exchange for the lifting of economic sanctions.”
That would peg the execution at last week.
http://www.middleeasteye.net/news/iran-executes-20-kurdish-militants-1363741922
“The group were hanged on Tuesday. [August 2, 2016]”
Thank you for the links.
So it happened about 5 days ago.