Chrono-TZ 0.4.0

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 parse-zoneinfo.

Documentation

Documentation is hosted on docs.rs

Usage

Put this in your Cargo.toml:

toml [dependencies] chrono = "0.4" chrono-tz = "0.4"

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

rust extern crate chrono; extern crate chrono_tz;

Examples

Create a time in one timezone and convert it to UTC

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

let pacifictime = Pacific.ymd(1990, 5, 6).andhms(12, 30, 45); let utctime = pacifictime.withtimezone(&UTC); asserteq!(utctime, UTC.ymd(1990, 5, 6).andhms(19, 30, 45)); ```

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

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

let naivedt = NaiveDate::fromymd(2038, 1, 19).andhms(3, 14, 08); let tzaware = Johannesburg.fromlocaldatetime(&naivedt).unwrap(); asserteq!(tzaware.tostring(), "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.

```rust use chrono::TimeZone; use chronotz::Europe::London; use chronotz::America::New_York;

let londontime = London.ymd(2016, 3, 18).andhms(3, 0, 0); let nytime = londontime.withtimezone(&NewYork); asserteq!(nytime, NewYork.ymd(2016, 3, 17).andhms(23, 0, 0)); ```

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

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

let dt = London.ymd(2016, 10, 29).andhms(12, 0, 0); let later = dt + Duration::hours(24); asserteq!(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

```rust use chrono::TimeZone; use chrono_tz::Asia::Kolkata;

let dt = Kolkata.ymd(2000, 1, 1).andhms(0, 0, 0); let timestamp = dt.timestamp(); asserteq!(timestamp, 946665000); ```

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

```rust use chrono::TimeZone; use chrono_tz::Europe::London;

let dt = London.ymd(2016, 5, 10).andhms(12, 0, 0); asserteq!(dt.tostring(), "2016-05-10 12:00:00 BST"); asserteq!(dt.to_rfc3339(), "2016-05-10T12:00:00+01:00"); ```

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

```rust use chrono::TimeZone; use chronotz::Tz; use chronotz::UTC;

let tz: Tz = "Antarctica/SouthPole".parse().unwrap(); let dt = tz.ymd(2016, 10, 22).andhms(12, 0, 0); let utc = dt.withtimezone(&UTC); asserteq!(utc.to_string(), "2016-10-21 23:00:00 UTC"); ```

Future Improvements