day 1 there is an accident sign now reads "0 Days since lost time accident"
day 2 there is an accident sign now reads "0 Days since lost time accident"
day 3 there is an accident sign now reads "0 Days since lost time accident"
day 4 there is an accident sign now reads "0 Days since lost time accident"
According to your logic there wasn't an accident on day 1, 2, or 3. Nice logic