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.
Night or nighttime (sp. night-time or night time) is the period of time between the sunset and the sunrise when the Sun is below the horizon. Complete darkness or astronomical night is the period of time between astronomical dusk and astronomical dawn when the sun is between 18 and 90 degrees below the horizon and the sky is totally dark.