Word jumbles (also sometimes known as "word searches" or "word search puzzles") are a fun activity for kids to pass the time. They are in fact an ideal way to keep kids busy on rainy days, when travelling, or when they are bored and need to something to fill the time. However, you should not regard these puzzles as simply a leisure activity _ they could have educational benefits too _ for example, by helping kids to learn to concentrate, to pay attention, and to focus on the precise spelling of the words in the puzzle.
The secret is in what search words you use; the more parallel to your needs, the closer you get. Be specific in your search terms. A place to begin might be: free calendar formats". If that doesn't give you what you want try adding words like Excel, Word, PDF, printable, or monthly, yearly, weekly, full page, quarterly, portrait/landscape, etc. For example: "free 2008 printable Excel calendar spreadsheet" or "calendar word download 2008 annual free" are more specific. Most big sites that offer calendars will have more than one year so the " is not necessary, but a web page with 2010 in it's keywords, description and page title will frequently be closer to what you really want.