Windows 7: Looking for a calender/reminder skin or program

I have a lot of dates I need to remember and don't have a phone (unfortunately) or anything related that would have such applications. So basically I'm looking for some sort of "thing" that can remember all the dates, notes and reminders I want to keep track of. It would be great if there was a Rainmeter skin that does this. Also any sort of applications would be great as well because alerts and popup reminders are always helpful.

you may want to look at rainlender...

Sunbird maybe,

Mozilla Sunbird®

Also don't forget Windows own Sticky Notes,

Sticky Notes - Create and Delete

I think I might've used Rainlender a long time ago because it seems so familiar... but anyways I'm going to give Rainlender and also Sunbird a try. Rainlender does seem much more simple, but who knows, Sunbird may have some great features I would like.

Thank you mickey megabyte && stormy13!

Active Desktop Calendar is a preferred app in my useful software catalog.

Active Desktop Calendar Software - Organizer with calendar on desktop wallpaper - XemiComputers

Forgot to mention (or ask), but if you use Thunderbird you can use Lighting with it,

Lightning - Project Home