Twilight Zone Day
Twilight Zone Day is held on May 11. The television show The Twilight Zone, was created, written and narrated by Rod Serling. It premiered on October 1, 1959. This event in the second decade of the month May is annual. 
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In aviation, ‘the twilight zone’ is the area between day and night at the edge of earth’s shadow that some planes pass through on long voyages. The original Twilight Zone changed science fiction and horror storytelling forever. Back in the ’50s and ’60s, almost every television show was shot on film. In addition to hosting the show, Rod Serling wrote almost all the episodes of The Twilight Zone.
Throughout its run, The Twilight Zone’s creators desperately wanted to make a spin-off that would continue the events of one of the episodes. Unfortunately, the show’s attempts to do so didn’t go so well.
Similar holidays and events, festivals and interesting facts
Clean Up Your Room Day on May 10
Windmill Day on May 10
National Animal Disaster Preparedness Day in US on May 10 (Held on the second Saturday of May);
Train Day on May 11
Root Canal Appreciation Day on May 11
Cat Parade or Kattenstoet in Belgium on May 11 (Held on the second Sunday in May);
Limerick Day on May 12 (celebrates the birthday of Writer Edward Lear: 1812-1888. Limericks were popularized by Lear in 1846 in his Book of Nonsense);
Odometer Day on May 12 (The odometer was invented by William Clayton in 1847)