Function zonedClockDate

apps/sim/lib/core/utils/timezone.ts:117–122

(instant: Date, timeZone: string)

 * the true instant always lives alongside it (e.g. a task's `runAt`).
 */
export function zonedClockDate(instant: Date, timeZone: string): Date {
  const [datePart, timePart] = zonedWallClock(instant, timeZone).split('T')
  const [year, month, day] = datePart.split('-').map(Number)
  const [hour, minute] = timePart.split(':').map(Number)
  return new Date(year, month - 1, day, hour, minute)
}

/** The UTC offset (ms, east-positive) of `timeZone` at a given instant. */
function timezoneOffsetMs(instant: Date, timeZone: string): number {