The Moon Phase Calendar in iCal!
Someone asked me if I had a calendar with the moon phase this week. What is great about iCal is that it is totally customizable. You can download calendars or subscribe to calendar feeds. I didn't find a feed for the Moon Phase, but I found a downloadable calendar on Apple.com that is good until 2015. To subscribe to a calendar in iCal, go to "Calendar" and choose "Subscribe...". You can enter the feed URL from there. For a downloadable calendar, you just have to double-click on the file you downloaded and iCal will let you add it to an existing calendar or create a new one. Here is the download link for "Moon Phase Calendar 2.0" from Apple.com.