Awesome GitHub RepositoriesImmutable Date Processing

Day.js is a lightweight utility for parsing, validating, and manipulating date objects. It provides a fluent, chainable interface that allows for complex time calculations and transformations to be performed through a sequence of readable method calls. By utilizing an immutable wrapper pattern, the library ensures data integrity by creating new instances for every operation rather than modifying existing objects. The project is distinguished by a minimalist core abstraction that maintains a small footprint by offloading non-essential features to an optional, modular plugin system. This archit

This project is a comprehensive programming tutorial and technical guide focused on the Java 8 language specification. It provides educational resources for implementing functional programming patterns, utilizing modern language syntax, and adopting updated API standards. The guide covers the transition to functional programming through the use of lambda expressions, method and constructor references, and functional interfaces. It also details the use of default interface methods to extend logic without breaking existing classes and the implementation of repeatable annotations. Additional co

Luxon is a JavaScript library for parsing, validating, manipulating, and formatting dates and times. It provides a suite of immutable objects for managing points in time, durations, and intervals, ensuring that all transformations return new instances to maintain predictable state. The library distinguishes itself by leveraging the native Internationalization API and environment-based time zone databases. This architecture allows for localized date formatting and global time zone conversions without requiring external data files or additional dependencies. It also supports non-Gregorian calen

This project is a proposal for a new immutable date and time API in JavaScript. It serves as a precision time-tracking library and a multi-calendar date engine designed to replace the legacy Date object. The system is distinguished by its support for multiple calendar systems beyond the ISO standard and its use of IANA-based time zone resolution. It provides a framework for managing daylight saving transitions and UTC offsets while maintaining nanosecond precision for global timestamps. The API covers broad functional areas including complex date and time arithmetic, locale-aware formatting,

Ben.Demystifier is a .NET library that transforms raw stack traces into modern C# 7+ syntax. It reads compiler-generated frames produced by async methods, iterators, lambdas, local functions, and generic types, then rewrites them to match the original source code, making exception call stacks and debug output immediately readable. The library resolves common compiler artifacts such as MoveNext frames back into their original async method or iterator names, shows declaring method names and ordinals for lambdas and local functions instead of generated identifiers, and displays resolved generi

kotlinx-datetime is a multiplatform library for handling date, time, and calendar operations across different targets. It provides a consistent set of data types for representing instants and local date-times, serving as a standardized API for temporal management. The toolkit focuses on ISO 8601 compliance for parsing and formatting date and time strings. It implements a multiplatform approach to ensure that timestamps and calendar logic remain consistent across all supported platforms. The library covers temporal data modeling, calendar arithmetic for calculating durations and periods, and