Similarly between "Last month" and "The last month".
Last week implies, at some point during the previous week. Not inclusive of the current week.
What exactly does the last week mean? Is that inclusive of the current time? Same question for the last n weeks?
Or are phrases ending with ago the only qualifier for being for being inclusive of the current week? A month ago pretty obviously implies a period of 30 days going back from current time.
Thanks in advance!