LocalTime

A TimeZone which represents the current local time zone on the system running your program.

This uses the underlying C calls to adjust the time rather than using specific D code based off of system settings to calculate the time such as PosixTimeZone and WindowsTimeZone do. That also means that it will use whatever the current time zone is on the system, even if the system's time zone changes while the program is running.

final

class LocalTime : TimeZone {

static immutable(LocalTime) opCall();

version(StdDdoc)

string name [@property getter];

string stdName [@property getter];

string dstName [@property getter];

bool hasDST [@property getter];

bool dstInEffect(long stdTime);

long utcToTZ(long stdTime);

long tzToUTC(long adjTime);

}

Members

Functions

dstInEffect bool dstInEffect(long stdTime): 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 in effect in this time zone at the given point in time.
tzToUTC long tzToUTC(long adjTime): Returns std time using the standard C function calls on Posix systems and the standard Windows system calls on Windows systems to adjust the time to UTC from the appropriate time zone.
utcToTZ long utcToTZ(long stdTime): Returns hnsecs in the local time zone using the standard C function calls on Posix systems and the standard Windows system calls on Windows systems to adjust the time to the appropriate time zone from std time.

Properties

dstName string dstName [@property getter]: 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 bool hasDST [@property getter]: 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 string name [@property getter]: In principle, this is the name of the local time zone. However, this always returns the empty string. This is because time zones cannot be uniquely identified by the attributes given by the OS (such as the stdName and dstName), and neither Posix systems nor Windows systems provide an easy way to get the TZ Database name of the local time zone.
stdName string stdName [@property getter]: 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.

Static functions

opCall immutable(LocalTime) opCall(): LocalTime is a singleton class. LocalTime returns its only instance.

Inherited Members

From TimeZone

name string name [@property getter]: The name of the time zone. Exactly how the time zone name is formatted depends on the derived class. In the case of PosixTimeZone, it's the TZ Database name, whereas with WindowsTimeZone, it's the name that Windows chose to give the registry key for that time zone (typically the name that they give stdTime if the OS is in English). For other time zone types, what it is depends on how they're implemented.
stdName string stdName [@property getter]: 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.
dstName string dstName [@property getter]: 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 bool hasDST [@property getter]: 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.
dstInEffect bool dstInEffect(long stdTime): 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.
utcToTZ long utcToTZ(long stdTime): 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.
tzToUTC long tzToUTC(long adjTime): 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 Duration utcOffsetAt(long stdTime): Returns what the offset from UTC is at the given std time. It includes the DST offset in effect at that time (if any).

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