The same “kids across the street” I reference in another comment needed translation from “quarter to eleven” when they’d ask the time. Makes sense given they couldn’t read an analog face at the time.
How does one get to "half ten" in German? Is it simply starting from "half to ten"?
Never thought about it much but I think you're spot on. English uses "half past" and therefore "half 10" means 10:30, whereas most other languages use "half to" which causes "half 10" to mean 9:30.
One would think this should cause confusion for international meetings often enough to be common knowledge, but I didn't know until today...
English thinkers might also want to consider the fact that 0930 is half-way through hour 10
The only other English common case I can think of is the American “I could [not] care less” dropping “not” which is also confusing.