Class `std.datetime.TimeZone`

Represents a time zone. It is used with SysTime to indicate the time zone of a SysTime.

Name	Type	Description
`dstName` [get]	`string`	Typically, the abbreviation (generally 3 or 4 letters) for the time zone when DST is in effect (e.g. PDT). It is not necessarily unique.
`hasDST` [get]	`bool`	Whether this time zone has Daylight Savings Time at any point in time. Note that for some time zone types it may not have DST for current dates but will still return true for `hasDST` because the time zone did at some point have DST.
`name` [get]	`string`	The `name` of the time zone per the TZ Database. This is the `name` used to get a `.TimeZone`, `TimeZone` by `name` with `TimeZone.getTimeZone`.
`stdName` [get]	`string`	Typically, the abbreviation (generally 3 or 4 letters) for the time zone when DST is not in effect (e.g. PST). It is not necessarily unique.

Name	Description
`dstInEffect`	Takes the number of hnsecs (100 ns) since midnight, January 1st, 1 A.D. in `UTC` time (i.e. std time) and returns whether DST is effect in this time zone at the given point in time.
`getInstalledTZNames`	Returns a list of the names of the time zones installed on the system.
`getTimeZone`	Returns a `.TimeZone`, `TimeZone` with the give `name` per the TZ Database.
`tzToUTC`	Takes the number of hnsecs (100 ns) since midnight, January 1st, 1 A.D. in this time zone's time and converts it to `UTC` (i.e. std time).
`utcOffsetAt`	Returns what the offset from `UTC` is at the given std time. It includes the DST offset in effect at that time (if any).
`utcToTZ`	Takes the number of hnsecs (100 ns) since midnight, January 1st, 1 A.D. in `UTC` time (i.e. std time) and converts it to this time zone's time.
`factory`	Create instance of class specified by the fully qualified name `classname`. The class must either have no constructors or have a default constructor.
`opCmp`	Compare with another `Object` obj.
`opEquals`	Returns !=0 if this `object` does have the same contents as obj.
`toHash`	Compute hash function for `Object`.
`toString`	Convert `Object` to a human readable string.

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