Very nice. I've thought about trying to figure this out and now that I've seen your formula, I'm positive I wouldn't have gotten there on my own . . . 🙂
You may want to augment your summary to include another option. Combining it with IFS and you can get the words to show.
IFS((FLOOR(@"""{"label":"Time","propertyDefaultType":"datetime","resourceType":"event","type":"number","value":"$time"}"""@/86400)+4)%7=0,"Sunday",(FLOOR(@"""{"label":"Time","propertyDefaultType":"datetime","resourceType":"event","type":"number","value":"$time"}"""@/86400)+4)%7=1,"Monday",(FLOOR(@"""{"label":"Time","propertyDefaultType":"datetime","resourceType":"event","type":"number","value":"$time"}"""@/86400)+4)%7=2,"Tuesday",(FLOOR(@"""{"label":"Time","propertyDefaultType":"datetime","resourceType":"event","type":"number","value":"$time"}"""@/86400)+4)%7=3,"Wednesday",(FLOOR(@"""{"label":"Time","propertyDefaultType":"datetime","resourceType":"event","type":"number","value":"$time"}"""@/86400)+4)%7=4,"Thursday",(FLOOR(@"""{"label":"Time","propertyDefaultType":"datetime","resourceType":"event","type":"number","value":"$time"}"""@/86400)+4)%7=5,"Friday",(FLOOR(@"""{"label":"Time","propertyDefaultType":"datetime","resourceType":"event","type":"number","value":"$time"}"""@/86400)+4)%7=6,"Saturday")
