No worries cogre,
For starters you can check in the vanilla game if there is a message in that date.
One way to do this is add the -ian command to your shortcut of MTW that enables you to autorun the campaign, so you don't have to play up to that date.
Another - potentially faster - way is to check on the txt. files that contain the text to find if there is any at that date - i'm pretty certain that the hardcoded messages text is located in the LOC folder of your main game that contains all the text descriptions, but i don't know if with the text the date of the message is shown.
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