We have the Lifechannel system here. Its quite boring to log in daily and change the date in the ticker.
Noseying around the file structure, we see that the text comes from a file called ticker.txt
How easy would it be to write a batch file that's called at, say, 6am every day that overwrites the existing ticker.txt with a fresh one that says "Welcome to our school. Today is <today's date>"?