This might be where the first day of issue is. It might be a city with which Monroe was connected. Or it might be the city in which she was born. In the case of Marilyn Monroe, Hollywood is an ideal postmark, for that is the scene of her famous work. It also happens to be where the FDI took place.
Many collectors carry the idea of the postmark even further, and get an appropriate date.
For Marilyn Monroe, and for that matter, any person, the date of her birthday would be a good date for the postmark. When you have a postcard, stamp, and postmark that fit together, they are said to be in maximum concordance. I will go into more detail about each of these elements later in this article, but that is a general idea of what a maximum card is. No stamp collector can do that. We don't create the stamp, the postcard, nor the postmark.