Retrograde in History · 2015
2015 Singapore Grand Prix
On September 20, 2015, Mercury was mid-loop — retrograde in Libra, tracing backward through 15°30′ of the sign.
WhenSeptember 20, 2015♎︎Libra 15°30′Rx windowSep 17 – Oct 9, 2015
The record
On 20 September 2015, the Formula One World Championship held its thirteenth round of the season at the Marina Bay Street Circuit in Singapore.
More from this window · Sep 17 – Oct 9, 2015
Coincidence, not causation: the date is real and ephemeris-based, but a retrograde window is observed, never blamed. For entertainment, not navigation.