class TZInfo::AmbiguousTime

{AmbiguousTime} is raised to indicate that a specified local time has more than one possible equivalent UTC time. Such ambiguities arise when the clocks are set back in a time zone, most commonly during the repeated hour when transitioning from daylight savings time to standard time.

{AmbiguousTime} is raised by {Timezone#local_datetime}, {Timezone#local_time}, {Timezone#local_timestamp}, {Timezone#local_to_utc} and {Timezone#period_for_local} when using an ambiguous time and not specifying how to resolve the ambiguity.