AceTime  0.5
Date and time classes for Arduino that support timezones from the TZ Database, and a system clock that can synchronize from an NTP server or an RTC chip.
Class List
Here are the classes, structs, unions and interfaces with brief descriptions:
[detail level 123]
 Nace_time
 Nbasic
 CMonthDayThe result of calcStartDayOfMonth()
 CTransitionData structure that defines the start of a specific UTC offset as described by the matching ZoneEra and its ZoneRule for a given year
 CZoneContextMetadata about the zone database
 CZoneEraAn entry in ZoneInfo which describes which ZonePolicy was being followed during a particular time period
 CZoneInfoRepresentation of a given time zone, implemented as an array of ZoneEra records
 CZonePolicyA collection of transition rules which describe the DST rules of a given administrative region
 CZoneRuleA time zone transition rule
 Nclock
 CSystemClockA TimeKeeper that uses the Arduino millis() function to advance the time returned to the user
 CSystemClockSyncCoroutineA coroutine that syncs the SystemClock with its mSyncTimeProvider
 CSystemClockSyncLoopA class that that syncs the SystemClock with its mSyncTimeProvider
 CTimeKeeperA TimeProvider whose time can be set by the end-user
 CTimeProviderBase class for objects that provide a source of time whose time cannot be changed by the end-user
 Ncommon
 CDateStringsClass that translates a numeric month (1-12) or dayOfWeek (1-7) into a human readable string
 CDirectZoneEraBrokerData broker for accessing ZoneEra in SRAM
 CDirectZoneInfoBrokerData broker for accessing ZoneInfo in SRAM
 CDirectZonePolicyBrokerData broker for accessing ZonePolicy in SRAM
 CDirectZoneRegistryBrokerData broker for accessing the ZoneRegistry in SRAM
 CDirectZoneRuleBrokerData broker for accessing ZoneRule in SRAM
 CFlashZoneEraBrokerData broker for accessing ZoneEra in PROGMEM
 CFlashZoneInfoBrokerData broker for accessing ZoneInfo in PROGMEM
 CFlashZonePolicyBrokerData broker for accessing ZonePolicy in PROGMEM
 CFlashZoneRegistryBrokerData broker for accessing the ZoneRegistry in PROGMEM
 CFlashZoneRuleBrokerData broker for accessing ZoneRule in PROGMEM
 CTimingStatsHelper class to collect timing statistics such as min, max, average
 Nextended
 CDateTupleA tuple that represents a date and time, using a timeCode that tracks the time component using 15-minute intervals
 CTransitionRepresents an interval of time where the time zone obeyed a certain UTC offset and DST delta
 CTransitionStorageA heap manager which is specialized and tuned to manage a collection of Transitions, keeping track of unused, used, and active states, using a fixed array of Transitions
 CYearMonthTupleA simple tuple to represent a year/month pair
 CZoneContextMetadata about the zone database
 CZoneEraAn entry in ZoneInfo which describes which ZonePolicy was being followed during a particular time period
 CZoneInfoRepresentation of a given time zone, implemented as an array of ZoneEra records
 CZoneMatchData structure that captures the matching ZoneEra and its ZoneRule transitions for a given year
 CZonePolicyA collection of transition rules which describe the DST rules of a given administrative region
 CZoneRuleA time zone transition rule
 CBasicZoneA thin wrapper around a basic::ZoneInfo data structure to provide a stable API access to some useful basic::ZoneInfo data
 CBasicZoneManager
 CBasicZoneProcessorAn implementation of ZoneProcessor that supports a subset of the zones containing in the TZ Database
 CBasicZoneProcessorCache
 CExtendedZoneA thin wrapper around an extended::ZoneInfo data structure to provide a stable API access to some useful extended::ZoneInfo data
 CExtendedZoneManager
 CExtendedZoneProcessorAn implementation of ZoneProcessor that works for all zones defined by the TZ Database (with some zones suffering a slight loss of accurancy described below)
 CExtendedZoneProcessorCache
 CLocalDateThe date (year, month, day) representing the date without regards to time zone
 CLocalDateTimeClass that holds the date-time as the components (year, month, day, hour, minute, second) without regards to the time zone
 CLocalTimeThe time (hour, minute, second) fields representing the time without regards to the day or the time zone
 COffsetDateTimeThe date (year, month, day), time (hour, minute, second) and offset from UTC (timeOffset)
 CTimeOffsetA thin wrapper that represents a time offset from a reference point, usually 00:00 at UTC, but not always
 CTimePeriodRepresents a period of time relative to some known point in time, potentially represented by a DateTime
 CTimeZoneClass that describes a time zone
 CTimeZoneDataData structure that captures the internal state of a TimeZone object with enough information so that it can be reconstructed using a ZoneManager
 CZonedDateTimeThe date (year, month, day), time (hour, minute, second), and a timeZone representing an instant in time
 CZoneManagerReturns the TimeZone given the zoneInfo, zoneName, or zoneId
 CZoneProcessorBase interface for ZoneProcessor classes
 CZoneProcessorCacheCommon interface to BasicZoneProcessorCache and ExtendedZoneProcessorCache
 CZoneProcessorCacheImplA cache of ZoneProcessors that provides a ZoneProcessor to the TimeZone upon request
 CZoneRegistrarClass that allows looking up the ZoneInfo (ZI) from its TZDB identifier (e.g