D

dates

Extends System.ComponentModel.DataAnnotations with validators for formats the native framework doesn't cover — IPv4/IPv6, SemVer, MAC addresses, GUIDs, URLs, port numbers, dates, and more. Performance-oriented, extensively tested, zero dependencies

Manipulate date and time in Emacs buffers according to POSIX timestamp patterns

Working with Python3 dates

Chrome extension calculates how many days and hours are between two datetimes

Utility that converts U.S. date format to European date format.

A small C++ library for manipulating dates, header-only.