Confused due date

I bought a Royal Enfield Bullet 350 recently. The first service is scheduled at 45 days or 450 km, whichever comes first.

So far, I’ve only ridden about 140 km, but tomorrow will complete 45 days since purchase. When I checked the Royal Enfield app, it shows the service due date as 5 March (tomorrow).

Does this mean 5 March is the last day to get the service done, or does it mean the service becomes overdue after 5 March? Since I haven't reached 450 km yet, I'm a bit confused about how strict the 45-day rule is.

Has anyone experienced this before? What should I do in this case?