| IdtTimeZone | Extends the TimeZoneInfo to allow run-time configuration of arbitrary time zones. |
| LocalTzInfoFileReader | Reads tzinfo file data from a local disk file |
| StreamTzInfoFileReader | Reads tzinfo file data from a local disk file |
| TimeChangeRule | Represents a rule that determines when a TimeZoneInfo switches between UTC offsets. |
| TimeChangeRuleParser | Defines the methods and properties of classes that parse textual information about timezone rules. |
| TimeZoneFactory | Creates IdtTimeZone classes as required by the running application. |
| TimeZoneRuleParser | Parses time zone rules from external sources. |
| TzInfoFileParser | Parses a tzinfo time zone file into its constituent TimeZoneRules and TimeChangeRules. |
| TzInfoTimeChangeRuleParser | Parses time zone change rules from the National Institutes of Health time zone files. |
| TzInfoTimeZoneRuleParser | Parses time zone rules from the National Institutes of Health time zone files. |
| WindowsTimeChangeRuleParser | Parses Windows timezone information to determine the rules represented by that information. |
| WindowsTimeZoneRuleParser | Parses Windows timezone information to determine the rules represented by that information. |
| TimeZoneOffset | Encapsulates display information for a time zone at a particular point in time. |
| TimeZoneRule | Defines which TimeChangeRule governs a time zone for a specific period of time. |
| TzInfoTime | Parses the time portion of an tzinfo rule text into a time of day. |
| ITimeZoneFactory | Creates IdtTimeZone classes as required by the running application. |
| ITzInfoFileReader | Defines the behavior of a class that provides raw tzinfo data to a parsing class. |
| ZoneNotFoundBehavior | Enumerates the behavior of the FindAsync(String, ZoneNotFoundBehavior) method. |