MHC (Message Harmonized Calendaring system) is a personal schedule management system, that is designed to help those who receive most appointments via email. . MHC has the following features: - You can easily import schedule articles from emails. - Simple data structure; schedule articles are stored in the same form of MH that allows you to manipulate stored data in many ways. - Powerful but simple expression of appointments. . This package provides mhc.el which cooperates with an emacsen mailer, Gnus, Mew, Wanderlust or cmail. Non Elisp (command line/GUI) utilities are provided by the mhc-utils package.