I think Apple is still doing that: https://developer.apple.com/documentation/foundation/nstimeinterval https://developer.apple.com/documentation/foundation/nsti

I think Apple is still doing that: https://developer.apple.com/documentation/foundation/nstimeinterval https://developer.apple.com/documentation/foundation/nstimei... Couple decades ago Microsoft did that too, VT_DATE in old OLE Automation keeping FP64 value inside. Luckily, their newer APIs and frameworks are using uint64 with 100-nanoseconds ticks.