posix_tz

Package Overview

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The posix_tz package simplifies working with timezones by providing tools to read and write timezone data according to the POSIX standard. It enables developers to handle timezone conversions and manipulations efficiently across multiple platforms, ensuring consistency in date and time operations. Designed for use in Flutter applications, it supports Android, iOS, Web, macOS, Windows, and Linux, making it ideal for cross-platform projects requiring accurate timezone handling.

Use cases

Cross-platform timezone management
Parsing and applying POSIX timezone formats
Timezone-aware date calculations
International application localization
Server-client timezone synchronization
Handling daylight saving transitions

Key features

POSIX timezone format support
Platform-agnostic implementation
Simple API for timezone parsing
Supports all major operating systems
Accurate daylight saving time handling
Lightweight and dependency-free

Suitable for

Developers building global apps
Applications needing precise timezone logic
Projects using POSIX timezone conventions
Flutter apps targeting multiple platforms
Teams requiring consistent timezone behavior

Considerations

Requires valid POSIX timezone strings
Limited to POSIX standard only
No built-in timezone database updates
May need manual timezone file maintenance
Not suitable for non-POSIX timezone formats
Depends on external timezone data sources for full coverage

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

Posix Tz

This library provides timezones in the standard Posix format. The data is obtained by reading the content of /usr/share/zoneinfo.

Initialization

It's important to initialize the library before reading the timezones.

void main() {
    await initializePosixTz();
}

Usage

// after initialization
final posixTz = db.get("Europe/Rome");
print(posixTz.toString()) // name:Europe/Rome, posix:CET-1CEST,M3.5.0,M10.5.0/3

Other

PosixTz can be compared.

final posixTz1 = posixTzDb.get('Europe/Rome');
final posixTz2 = posixTzDb.get('Europe/Rome');
final posixTz3 = posixTzDb.get('Atlantic/Stanley');
print(posixTz1 == posixTz2); // true
print(posixTz1 == posixTz3); // false

posixTzDb can be expanded.

posixTzDb.add(PosixTz(name: "Ababwa",posix: "<+06>-6"));

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