chrono-tz 0.2.4

TimeZone implementations for rust-chrono from the IANA database

Crate chrono_tz [] [src]

Chrono-TZ 0.2.4

Chrono-TZ is a library that provides implementors of the TimeZone trait for rust-chrono. The impls are generated by a build script using the IANA database and zoneinfo_parse.

Usage

Put this in your Cargo.toml:

[dependencies]
chrono = "0.2"
chrono-tz = "0.2"

Then you will need to write (in your crate root):

extern crate chrono;
extern crate chrono_tz;

Examples

Create a time in one timezone and convert it to UTC

use chrono::{TimeZone, UTC};
use chrono_tz::US::Pacific;

let pacific_time = Pacific.ymd(1990, 5, 6).and_hms(12, 30, 45);
let utc_time = pacific_time.with_timezone(&UTC);
assert_eq!(utc_time, UTC.ymd(1990, 5, 6).and_hms(19, 30, 45));

Create a naive datetime and convert it to a timezone-aware datetime

use chrono::{TimeZone, NaiveDate};
use chrono_tz::Africa::Johannesburg;

let naive_dt = NaiveDate::from_ymd(2038, 1, 19).and_hms(3, 14, 08);
let tz_aware = Johannesburg.from_local_datetime(&naive_dt).unwrap();
assert_eq!(tz_aware.to_string(), "2038-01-19 03:14:08 SAST");

London and New York change their clocks on different days in March so only have a 4-hour difference on certain days.

use chrono::TimeZone;
use chrono_tz::Europe::London;
use chrono_tz::America::New_York;

let london_time = London.ymd(2016, 3, 18).and_hms(3, 0, 0);
let ny_time = london_time.with_timezone(&New_York);
assert_eq!(ny_time, New_York.ymd(2016, 3, 17).and_hms(23, 0, 0));

Adding 24 hours across a daylight savings change causes a change in local time

use chrono::{TimeZone, Duration};
use chrono_tz::Europe::London;

let dt = London.ymd(2016, 10, 29).and_hms(12, 0, 0);
let later = dt + Duration::hours(24);
assert_eq!(later, London.ymd(2016, 10, 30).and_hms(11, 0, 0));

And of course you can always convert a local time to a unix timestamp

use chrono::TimeZone;
use chrono_tz::Asia::Kolkata;
 
let dt = Kolkata.ymd(2000, 1, 1).and_hms(0, 0, 0);
let timestamp = dt.timestamp();
assert_eq!(timestamp, 946665000);

Pretty-printing a string will use the correct abbreviation for the timezone

use chrono::TimeZone;
use chrono_tz::Europe::London;
 
let dt = London.ymd(2016, 5, 10).and_hms(12, 0, 0);
assert_eq!(dt.to_string(), "2016-05-10 12:00:00 BST");
assert_eq!(dt.to_rfc3339(), "2016-05-10T12:00:00+01:00");

You can convert a timezone string to a timezone using the FromStr trait

use chrono::TimeZone;
use chrono_tz::Tz;
use chrono_tz::UTC;
 
let tz: Tz = "Antarctica/South_Pole".parse().unwrap();
let dt = tz.ymd(2016, 10, 22).and_hms(12, 0, 0);
let utc = dt.with_timezone(&UTC);
assert_eq!(utc.to_string(), "2016-10-21 23:00:00 UTC");

Modules

Africa
America
Antarctica
Arctic
Asia
Atlantic
Australia
Brazil
Canada
Chile
Etc
Europe
Indian
Mexico
Pacific
US

Enums

Tz

Constants

CET
CST6CDT
Cuba
EET
EST
EST5EDT
Egypt
Eire
GB
GBEire
GMT
GMT0
GMTMinus0
GMTPlus0
Greenwich
HST
Hongkong
Iceland
Iran
Israel
Jamaica
Japan
Kwajalein
Libya
MET
MST
MST7MDT
NZ
NZCHAT
Navajo
PRC
PST8PDT
Poland
Portugal
ROC
ROK
Singapore
Turkey
UCT
UTC
Universal
WET
WSU
Zulu