docs / stdlib / time

Stdlib index
  1. Overview
  1. Captured-borrow migration worklist (3.3.3)
  2. Owned-bind migration worklist (8.2.7)
  3. Return-side title audit — the ride-through enumeration
  4. stdlib ownership audit
  5. stdlib ownership dispositions (plan 1.3.1 / 4.3.1)

codec

  1. Base64

codec / csv

  1. Csv

codec / json

  1. Json

collection

  1. ArrayList
  2. BPlusTree
  3. Cache
  4. Collectors
  5. HashMap
  6. HashSet
  7. Heap
  8. ImmutableList
  9. ImmutableMap
  10. ImmutableSet
  11. LinkedList
  12. RedBlackTree
  13. Sort

collection / ltm

  1. LtmBPlusTree

concurrent

  1. AtomicInt32
  2. AtomicInt64
  3. Channel
  4. FiberLocal
  5. Lock
  6. Mutex
  7. RwLock
  8. Semaphore
  9. Tasks

error

  1. Exception
  2. NoOptionalValueException
  3. RecoverableException
  4. Throwable
  5. UnrecoverableException

gfx

  1. Sampler
  2. Texture2D

hash

  1. Blake3
  2. DefaultHasher
  3. Hash
  4. MD5
  5. Sha1
  6. Sha256
  7. SipHash
  8. XXHash3

ifx

  1. BackendRegistry
  2. Window

io

  1. Buffer

io / file

  1. File
  2. FileInfo
  3. FileReader
  4. FileWriter
  5. Path
  6. Watcher

io / net

  1. IpAddress
  2. Server
  3. ServerBuilder
  4. SocketAddress
  5. TcpListener
  6. TcpStream
  7. UdpSocket

io / net / dns

  1. Dns

io / net / tls

  1. TlsConnection
  2. TlsListener

io / net / uri

  1. Uri
  2. UriBuilder

lang

  1. Guid
  2. Math
  3. Optional
  4. Pair
  5. Slice
  6. String
  7. StringBuilder

lang / stream

  1. ArrayStream
  2. Stream

math

  1. Camera
  2. Color
  3. DType
  4. Ray
  5. Rotation
  6. Tensor
  7. Transform

math / fft

  1. Fft

math / linalg

  1. LinAlg

math / npio

  1. Npy

math / poly

  1. Poly

math / random

  1. Generator

math / stats

  1. Stats

nucleo

  1. Columns — the Arrow-laid-out substrate
  2. Fused tensor expressions — Fuse
  3. Table — the lazy, typed dataframe
  4. Tape — define-by-run autograd
  5. Transform intrinsics — Grad, Vmap, Jit

process

  1. Command
  2. Process

reflect

  1. Class

search / distance

  1. Distance

search / fuzzy

  1. Matcher

search / ngram

  1. Index

session

  1. PackageInstallException
  2. Packages

time

  1. Clock
  2. DateTimeFormatter
  3. Duration
  4. Instant
  5. LocalDate
  6. LocalDateTime
  7. LocalTime
  8. Period
  9. ZonedDateTime
  10. ZoneId
  11. ZoneOffset

wire

  1. Compressor
  2. Decompressor
  3. Encoder
  4. Schema
  5. SchemaEncoder

xpu

  1. Device
  2. KernelBuffer
  3. KernelStream

xpu / mesh

  1. MeshSimplifier

ZoneId

cajeta.time.ZoneId — a geographical/region time-zone identifier (e.g. America/Los_Angeles, Europe/Paris, UTC), modeled on the region subset of java.time.ZoneId. Unlike a fixed ZoneOffset, a ZoneId maps to different offsets at different instants — it honours daylight-saving transitions. Offsets are resolved against the system tz database (/usr/share/zoneinfo); UTC / GMT / Z / Etc/UTC resolve to a zero offset without touching the filesystem, and any other unknown or unavailable zone makes offsetAt throw DateTimeException. Unlike the package’s value types it is a reference object, created with ZoneId.of(...).

ZoneId utc #= ZoneId.of("UTC");
Instant t0 = Instant.ofEpochSecond(1000L);
ZoneOffset off = utc.offsetAt(t0);   // +00:00
ZonedDateTime zdt = utc.resolve(t0);

Methods

Signature
ZoneId(String id)Wraps a raw IANA id; prefer the of factory
static #ZoneId of(String id)The zone with the given IANA id
static #ZoneId utc()The UTC zone; always resolves to a zero ZoneOffset without touching the tz database
String getId()The IANA id string this zone was created with
ZoneOffset offsetAt(Instant instant)The UTC offset in effect in this zone at instant (DST-aware)
ZonedDateTime resolve(Instant instant)The ZonedDateTime for instant observed in this zone

⚑ = @EntryPoint

See also

Source: docs/stdlib/time/ZoneId.md · 1 min read · 204 words