20 year sounds better
No. Write either 20th Reunion Classes or 20-Year Reunion Classes.
yes
The Smothers Brothers Comedy Hour The 20th Reunion - 1988 TV was released on: USA: 3 February 1988
Yes. It's at noon on Wednesday, February 20th, at Reunion Arena.
Yes, "20eth" is not a correct spelling. The correct way to write it would be "20 ETH," which stands for 20 units of the cryptocurrency Ethereum.
Twentieth.
Twentieth, which is the way you have it, is the correct spelling, as in the 20th of January.
Twentieth.
20th century
The cast of Highlights from the 20th Anniversary Reunion Party of the Comedians - 1991 includes: Stan Boardman as himself Duggie Brown as himself Ivor Davis as himself Tony Jo as himself Bernard Manning as himself Mick Miller as himself Charlie Williams as himself
2^20
She graduated from Lamar High School in 1995. She attended her 20th high school reunion in 2015.