Platform independent
Rainlendar can be run on Windows, Mac OS X and Linux. All platforms use the same file formats so all skins and scripts created for different versions will work also on all.

Localized
Rainlendar supports localization so you can have the user interface in your own language. Rainlendar is an Unicode application so different character sets can be used at the same time.

Standards Compatible
Rainlendar uses standard iCalendar format for it events and tasks to maximize the compatibility with other calendar applications. You can easily transfer the events from the calendar you are currently using to Rainlendar.

Look'n'feel
The appearance of the calendar can be changed with skins. The skins can be of any shape and size and they can also use scripts for additional functionality. It's also possible to combine different skins by using e.g. the calendar from one skin and event and to do list from another. The events and tasks can have different appearance depending on their category.

Highly Customizable
It is possible to have multiple months visible at the same time. The months can be laid out the way you want and they can even have different sizes.

Multiple Calendars
You can have any number of calendars show at the same time. Different calendars can show e.g. holidays, tv programs, your personal events or what ever you like.

Import & Export
Events and tasks can be transferred to and from other calendar applications. You can also import the data from the old version of Rainlendar.

Remember The Milk support (Pro only)
Access your RTM task from Rainlendar. It works also when you are not connected.

To do list
In addition to normal events Rainlendar includes a separate to do list where you can store your ongoing tasks.

Alarms
Get notified in advance before the event is due so that you don't forget any important events. The alarm works with tasks too.

Recurrence
The events and tasks can be made to repeat automatically so you don't have to enter them multiple times. It's also possible to have exceptions in case the event doesn't happen on one particular day.

Scripting
Lua scripting language makes it possible to extend the functionality of Rainlendar.

Backups
Integrated backup and restore functionality makes it easy to make sure your events safe if something bad happens.

Printing
Print your events and tasks as a separate list or as a month view.

Search
If you have a lot of events and tasks you can find the one you are looking for easily with the substring search in the Manager dialog.

Shared calendars (Pro only)
Subscribe to online calendars to stay up to date with the current events. You can also publish your own calendar online.

Outlook support (Pro & Windows only)
See the Microsoft Outlook's appointments in Rainlendar without the need to keep Outlook open all the time.

Google Calendar support (Pro only)
Edit your Google calendar events directly with Rainlendar. It works also when you are not connected.