what is the complete and simple subject for "Valentine's day has a very interesting History."

The complete and simple subjects are the same: Valentine's Day.

To determine the complete and simple subject for the sentence "Valentine's day has a very interesting history," let's break it down:

1. Identify the main verb: The main verb in this sentence is "has," which indicates possession or ownership.

2. Determine the subject of the verb: The subject of the verb "has" is "Valentine's day."

3. Analyze the subject: The subject, "Valentine's day," is the complete subject, as it is a noun phrase that includes the noun "day" and the adjective "Valentine's." However, if we want to identify the simple subject, we need to eliminate any modifiers and focus on the essential part of the subject.

4. Identify the simple subject: In this case, the simple subject is "day," as it is the core noun in the subject phrase without any modifiers.

Therefore, the complete subject is "Valentine's day," and the simple subject is "day."