Why does JavaScript's Temporal API use different types for different time concepts?

Answer: It helps avoid mixing up instants, dates, and durations.

It helps avoid mixing up instants, dates, and durations. ✓ — Temporal provides distinct types for instants, calendar dates, times, durations, and timezone-aware values. This explicit separation helps developers avoid accidentally mixing them, which is a common source of bugs.

It allows timezones to be ignored entirely. — Temporal actually helps handle timezones correctly by providing types that are timezone-aware. It doesn't ignore timezones; it models them explicitly.

It makes the API more complicated than necessary. — The goal is not to add complexity, but to make the meaning of each value clear. The API is designed to be more intuitive once you understand the types.