Every deadline, from one date.

Almost no deadline in a purchase contract is a date. It is a number of days from a reference point, which is why moving the contract date moves six other things. Enter the date and the day counts your contract actually uses.

Two things worth noticing

Consideration chains off the inspection period, not off the contract date. So a two-day change to the contract date moves inspection by two days, which moves consideration by two days. It arrives second-hand, which is why it is the one people forget.

The walkthrough counts backwards from closing. It is the one date that does not move when the contract date moves, and shifting everything forward by reflex gets it wrong in the other direction.

What this does not know

Business days here means Monday to Friday. Federal and state holidays are not excluded, because which ones count is contract-specific and jurisdiction-specific, so treat a deadline that lands near one as a question rather than an answer.

Day counts vary by state and by contract, and some contracts switch between business and calendar days inside one document without flagging it. The numbers above are common defaults, not rules. Yours come from the contract in front of you, and none of this is legal advice.