None of day†‡, hour‡, or minute‡ are fixed duration, either, depending on use cases & circumstance. An absolute delta type is good to have, but it's also usefu

None of day†‡, hour‡, or minute‡ are fixed duration, either, depending on use cases & circumstance. An absolute delta type is good to have, but it's also useful to have a "relative delta" type (how my language calls it). Each has their use cases. † ±1–2h on DST enter/exits ‡ ±1s during leap seconds