1. Noun: When a date refers to a specific day, month, or year, it acts as a noun.
* Example: "My birthday is on July 15th." (July 15th is the noun, the object of the preposition "on").
2. Adjective: Dates can act as adjectives when they modify a noun.
* Example: "The 2023 report shows a decline in sales." (2023 modifies the noun "report").
3. Adverb: Dates can function as adverbs when they answer the question "when?".
* Example: "I will visit you next Tuesday." (next Tuesday tells us when the speaker will visit).
4. Prepositional Phrase: A date can be part of a prepositional phrase, acting as the object of the preposition.
* Example: "I started this project on January 1st." (January 1st is the object of the preposition "on").
Important Note: The specific part of speech will depend on the context of the sentence.