987 Service Question
 

Started and drove my 06' 987 the other day. The information display said "Service Vehicle in 24 days". I imagine it's a countdown thing but for what? Car is only 1.5 yrs old with 7,000 miles, what gives? I know, I know I'll be getting a oil change soon but what else is this service reminder for? Can't be air filter, cabin filter, or any of those little things yet. Any input on this would be appreciated and... how to reset it (actually I may have already reset it using the "clear messages" function).