It will depend upon your specific state's laws regarding the expiration of inspection stickers, but most states' inspection stickers do not expire until the end of the month punched.
For example, the New York State Department of Motor Vehicles states that inspection stickers expire at the end of the month punched out on the sticker. If you are from New York state and your inspection sticker says November, then you would have until the end of November to get your car inspected and new inspection sticker placed on your vehicle. It appears at some point in time they had an extra hole to punch for the part of the month the inspection sticker expired, but the DMV reverted to the old policy.
In New York, if the inspection sticker on your vehicle has expired in the past 60 days, you can receive a fine of $25 to $50. If the inspection sticker is expired more than 60 days, the fine is between $50 and $100. If there is no inspection sticker, the fine is between $50 and $100. Mandatory state surcharges of up to $55 are added to the fine.
Learn about New York insurance laws and everything you need to know about New York car insurance on our state page.