Did you mean Black Friday ? Cyber Monday perhaps ?
...or Long Exposure Of Beautiful Blue Bioluminescence At Black`s Beach In San Diego. Looking Down From Atop The Cliffs. Royalty-Free Stock Photo

Bioluminescent algae blooms like the ever-popular dinoflagellate marine algae called Sea Sparkle are most frequently observed away from shorelines. Though beautiful in the dead of night, during the day these blooming phytoplankton are less than stunning. They often turn ocean water red and murky, and emit a distasteful smell of decay that comes from the algae starving the water of oxygen.