Utter as in uttering, usually goes along with forgery, but not necessarily. Uttering a forged instrument is the act of presenting for payment a document (check) that is not the property of the presenter. A forged money order, busness or cashiers check applies as well. Generally a person convicted of this offense is caught writing someone elses personal checks without ther approval.
It is starting to get dark between 7 and 7:30, right now (remember, that's really 6 - 6:30, starndard time). It being early September now, that means it will be starting to get dark by 7PM, for all intents and purposes, and will be essentially completely dark by 8PM.
1 You must turn on your headlights when it becomes dark outside. Some states require headlights to be turned on 30 minutes after sunset until 30 minutes before sunrise.  Headlights must be turned on when visibility is low.