The main themes in "The Necklace" are greed, deceptive appearances, and beauty and vanity. Greed: Mathilde Loisel's overwhelming desire to live a life of luxury blinds her to the comforts she already possesses and ultimately leads to her losing what wealth and status she initially has.
You don't need to be so precise and say the month or the date because there's not that high of a chance that something would change in a newer edition from the same year.
Answer: Because if you are uncertain of what's happening then you don't know how to deal with the situation. So in order to compensate for that not knowing, you take a risk.
