Yes, there is a comma after "Last Saturday" if it is used at the beginning of a sentence or an introductory phrase. For example: "Last Saturday, we went to the park." However, if "Last Saturday" appears in the middle of a sentence, a comma may not be necessary.
Example run on sentence: "He won the competition last Saturday he celebrated with his family." Instead of a comma, put a period or a semicolon in between: "He won the competition last Saturday. He celebrated with his family." Or combine the sentences, since they have the same subject. "He won the competition last Saturday, and then celebrated with his family."
last comma before the and is not necessary
You can use ", and" or just "and" but not just a comma.
no
"last" is an adjective, and Saturday is a proper noun (always capitalized).
A comma splice is the attempt to join two independent clauses with a comma without a coordinating conjunction. For example, "She walked the dog last night, today she fed it."
Yes, "last Saturday" is a prepositional phrase. It starts with the preposition "last" and is followed by the noun "Saturday," functioning as the object of the preposition.
No, you do not typically put a comma between a person's last name and their suffix (e.g., Jr., Sr., III). You would write the full name without a comma between them.
Yes, a comma should be used after introductory words like "yesterday" or "last night" to separate them from the main part of the sentence. For example: "Yesterday, we went to the beach."
You went swimming, rock climbing, and skating last week. (The second comma is optional, I just prefer it. But if you only need one comma then you can leave it out.)
Not necessarily. Only use a comma when the final please is a request. For example, we say Do as you please; but Sit down, please.
This question is date sensitive; "last Saturday" changes every week.