What day is it today?
As expected, “SeaArt AI” is forgetful, and it has also forgotten “DALL-E 3”. Does “Leonardo AI” misunderstand signage, or is it trying to say that the future is holograms?
May 31st is “Car Window Signage Day”.
Signage is an English word that originally means a signboard or sign. This day was established to promote and encourage the use of “car window signage,” a service that displays advertisements on the windows of taxis using a projector inside the car.
DALL・E 3

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SeaArt AI

Leonardo AI

“Car Window Signage Day” prompt
Create a hyper-realistic portrait of a supercar driving through a futuristic cityscape.
The windows of the supercar are digital signage.
The digital signage is displaying advertisements.
The background is outer space with several planets.
The overall design has a fantasy-inspired style.
Summary of what day it is today: May 31st
- Car Window Signage Day: Signage is originally an English word meaning a signboard or sign. This day was established to spread awareness of the “car window signage” service, which displays advertisements on taxi windows using a projector inside the car, and to encourage people to make use of it.
- Seiho-ki: This day is named after the haiku poet Shimada Seiho, who was a victim of the New Haiku Suppression Incident, who died on this day in 1944. It is a summer seasonal word.
- Old Materials Day: This day was established to spread awareness of the effective use of materials (old materials) used in old wooden buildings. It comes from the wordplay “ko (5) za (3) i (1)”.