I just turned to July 2009 on my calendar and wrote "Lavender Farm" in an open space at the top. I also wrote "Sheep Festival" on the May page and "Black Raspberries" at the top of August.
Time goes so quickly and the day-to-day bustle can make it easy to miss the really special events that only happen once a year. What do you want to see, hear, do this year? Figure out when it happens and jot a note to yourself on the calendar. You'll be glad you did.