Fact sheet.First published: Thrilling Wonder Stories, February 1941.
Note: ISFDB describes this as an essay, but it's clearly a story.
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Related: Stories of Henry Kuttner.
Found a broken link? May be the story can still be found.
Trying to figure out science fiction
11:30 pm in this clock (that's 6 pm GMT).
The clock shows India time (IST). Note India doesn't have any concept of daylight saving time; so if your locale has it, the relative posting time will appear to have changed with your time change.