Lockscreen Calendar is a handy Android application that puts your upcoming calendar events right on your lock screen–and therefore right in front of you every time you go to open your phone.
Carrying around your calendar in your pocket is useless if you forget to check it. Lockscreen Calendar puts upcoming events on your lock screen so that every time you unlock your phone you get an instant refresher of the upcoming events. You can configure they way it displays the date, whether it shows the location of the event or not, and how often it updates.
Hit up the link below to grab a copy. Lockscreen Calendar requires Android 2.2+ and is only compatible with the stock lock screen (sorry Sense UI users).