May 18, 1945 - As one of the only cities in North America bombed by the Germans during WWII, St. John's was under strict blackout rules beginning in 1943.
No lights at night - not even through the window of your home.
On May 18, 1945, the blackout rules were lifted by the British Parliament.

Vintage St. John's
The habit was hard to break, though. To her death, my grandmother would close the blinds at sunset.