ICalendar v2.2

iCalendar is a standard (RFC 2445) for calendar data exchange. The standard is sometimes referred to as "iCal", which also is the name of the Apple Computer calendar program that provides one of the implementations of the standard.
iCalendar allows users to send meeting requests and tasks to other users through emails.

 Recipients of the iCalendar email (with supported software) can respond to the sender easily or counter propose another meeting date/time.
It is implemented/supported by a large number of products, including 30 Boxes, AiAi, Active Desktop Calendar,

 Apple's iCal application, Darwin Calendar Server, Contactizer and iPod, Chandler, Drupal with its event module, Citadel, eventSherpa, Facebook, FirstClass, Google Calendar, Jalios JCMS, KOrganizer, Kronolith, Lotus Notes, Lovento,

Mozilla Calendar (including Mozilla Sunbird), Mulberry, Plum Canary Chirp, Novell Evolution, Nuvvo, Rainlendar, ScheduleWorld, Simple Groupware, TimeTrade's enterprise scheduling server, Upcoming.org, WebCalendar, Windows Calendar, Webical, Zimbra Collaboration Suite, and Microsoft Outlook (see below).

iCalendar data is typically exchanged using traditional email, but the standard is designed to be independent of the transport protocol. For example, it can also be shared and edited by using a WebDav server, or SyncML. Simple web servers (using just the HTTP protocol) are often used to distribute iCalendar data about an event and to publish busy times of an individual. Event sites on the web are embedding iCalendar data in web pages using hCalendar.

Aspose.iCalendar is a .NET class library providing classes and algorithms useful for time-oriented Recurrence Patterns,

or schedules. With it, you can:
Easily and reliably calculate occurrence dates and times for even the most complex recurrence patterns;
Consume and produce recurrence patterns in iCalendar (RFC 2445) format;
Create recurrence patterns programmatically via an intuitive object model;
Use yearly, monthly, weekly, daily, hourly,