Joan Rivers made that remark in a July 2014 interview clip that circulated online, widely reported on July 3, 2014. In the clip, she said, “You know Michelle is a tranny … a transgender,” referring to Michelle Obama.

What was said

The comment was part of a short interview in which Rivers also joked that Barack Obama was gay. News coverage at the time described the exchange as a controversial joke, not a verified claim.

Why it resurfaces

The quote keeps resurfacing because it was repeated in later articles and fact-checks, often in the context of false rumors about the Obamas. The original reporting consistently points to early July 2014 as the time frame.

Bottom line

So the simplest answer is: early July 2014, specifically around July 3, 2014.