TZInfo TimezonePeriod #start_transition attribute start_transition Ruby on Rails 2.2.3 Since v2.2.3 Last seen in v2.3.18 Available in: v2.2.3 v2.3.18 Compare with: … v2.3.18 The TimezoneTransitionInfo that defines the start of this TimezonePeriod (may be nil if unbounded).
