30 November 1835
Explanation:
Twain was born two weeks after Halley's Comet's closest approach in 1835; he said in 1909: I came in with Halley's Comet in 1835. It is coming again next year, and I expect to go out with it. It will be the greatest disappointment of my life if I don't go out with Halley's Comet.
The 8 parts of speech are
1. Nouns
2. Pronouns
3. Verbs
4. Adjectives
5. Articles
6. Adverbs
7. Preposition
8. Conjunction
9. Interjections