Front of RHC QSL card (click to enlarge).

Many thanks to SWLing Post contributor, Daniel Amoroso, who shares this QSL card and notes:

Hello Thomas, 

Attached is QSL # 1 from Radio Habana Cuba for their shortwave broadcast on 8- 15-2015

This was the day the US Embassy in Cuba was officially re-opened.

Back of RHC QSL card (click to enlarge).

Card was received on April 18 , 2016.

Very cool!  Thank you for sharing this card and noting that relevant bit of history, Daniel.