[][src]Crate tzparse

This library's functions are used to retrieve time changes and date/time characteristics for a given TZ. Based on data provided by IANA timezone files and low-level parsing library. System TZfiles default location can be overriden with the TZFILES_DIR environment variable.

There are two functions:

get_zoneinfo parses the tzfile and returns a Tzinfo struct which provides useful and human-readable data about the timezone and can be converted to a json string with an optional feature.

get_timechanges obtains time changes for specified year, or all time changes recorded in the TZfile if no year is specified.

Example with get_zoneinfo:

[dependencies]
tzparse = { version = "1.0.0", features=["json"] }

fn main() {
    println!("{}", tzparse::get_zoneinfo("Europe/Paris").unwrap().to_json().unwrap());
}

Outputs:

{"timezone":"Europe/Paris","utc_datetime":"2020-01-22T14:12:36.792898Z","datetime":"2020-01-22T15:12:36.792898+01:00",
"dst_from":"2020-03-29T01:00:00Z","dst_until":"2020-10-25T01:00:00Z","dst_period":false,"raw_offset":3600,
"dst_offset":7200,"utc_offset":"+01:00","abbreviation":"CET","week_number":4}

The get_timechanges function for Europe/Paris in 2019 returns:

[Timechange { time: 2019-03-31T01:00:00Z, gmtoff: 7200, isdst: true, abbreviation: "CEST" },
Timechange { time: 2019-10-27T01:00:00Z, gmtoff: 3600, isdst: false, abbreviation: "CET" }]

Be aware that with 1.0.0 Tzinfo struct and functions have received some changes (2 more fields and Result instead of Option return types).

Structs

Timechange

The Timechange struct contains one timechange from the parsed TZfile.

Tzinfo

Functions

get_timechanges

Returns year's timechanges for a timezone. If year is Some(0), returns current year's timechanges. If there's no timechange for selected year, returns the last occured timechange to see selected zone's applying parameters. If no year (None) is specified, returns all time changes recorded in the TZfile .

get_zoneinfo

Returns convenient data about a timezone for current date and time.