Go to the settings of the screensaver and change the message.  Press the "More Options" button and go to the "Star Messages" tab and change any other messages that are preconfigured.

The starmessage screensaver can countdown the days until a specific event. Here is how to setup this feature:
- Go to the screensaver configuration screen
- Click on [May I have more options]
- In the "Star Messages" tab, click on [NEW] to create a new message
- Click on [Countdown] and enter the expected date.
- You will see that the current message has changed to "COUNTDOWN". Do not change this text. When the screensaver reads this text, it creates a text with the remaining days according to the countdown timer.
- Optionally, in the bottom line, type any text you want.
- You are done!

Now, the next time the screensaver will start, it will go through and show all the messages in the sky and when it will arrive to the "COUNTDOWN" message, it wil show you the remaining days.

Tip: If you want this countdown message to be the first of the messages shown by the screensaver, follow the above procedure and additionally, go to the screensaver main configuration screen and type "COUNTDOWN" as the message.