Chrono-TZ 0.1.0

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.

Usage

Put this in your Cargo.toml:

toml [dependencies] chrono = "0.2" chrono-tz = "0.1"

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)); ```

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"); ```

Known Issues

The timezone info for Dushanbe is not parsed correctly by zoneinfo_parse and so I have commented out a line from that file to work around it.

```

Tajikistan

From Shanks & Pottenger.

Zone NAME GMTOFF RULES FORMAT [UNTIL]

Zone Asia/Dushanbe 4:35:12 - LMT 1924 May 2 5:00 - +05 1930 Jun 21 6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s

5:00 1:00 +05/+06 1991 Sep 9 2:00s # FIXME: fails to parse

        5:00    -   +05

```

Strings cannot be parsed into appropriate datetimes currently, they can only be printed out. Chrono handles fixed offsets only for parsing.

Currently no rustc-serialize or serde support.