Moment.js + moment-timezone

npm install @time-provider/core @time-provider/plugin-moment-timezone

// production
import { createTimeProvider } from "@time-provider/core";
import { plugin } from "@time-provider/plugin-moment-timezone";

const timeProvider = createTimeProvider.for(plugin).withTimezone("Europe/Paris").create();

timeProvider.clock.utcNow(); // moment.Moment, in UTC
timeProvider.clock.localNow(); // moment.Moment, in Europe/Paris

// tests — same date type, from the /deterministic subpath
import { createTimeProvider } from "@time-provider/core/deterministic";
import { plugin } from "@time-provider/plugin-moment-timezone/deterministic";

const timeProvider = createTimeProvider.for(plugin).asFixed().withFixedTime(0).create();

• Date type: moment.Moment (same as plain Moment.js).
• Peer dependencies: moment and moment-timezone.
• Timezone support: full — ISystemPlugin/ITimeProvider (or IDeterministicPlugin on the /deterministic side), real IANA zones via moment-timezone's bundled data.

Pick this over plain plugin-moment whenever you need .withTimezone(...)/clock.localNow() and can afford moment-timezone's extra bundle size.