I'm sure the service warning is triggered by either date or mileage. My service indicator came on 2 weeks before the service was due although I'd only done 2k miles. I might try to set the wrong date to see if anything is triggered
I re correct myself. Date is involved in the service light coming on. I can now remember having to reset mine myself after peugeot didn't do it! Mine only had 4.5k on when light showed up around the year interval coming up.
I had the same disappointment. The date isn't displayed anywhere including SMEG or on dashboard. Even 15 years-old cars show that. You can only set date but cannot display. Only "time" is displayed on right-top on SMEG.