red-letter

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

SpaceX’s big news, along with Anthropic’s showing potential to turn a profit far sooner than expected and OpenAI’s prepping for its public debut, made yesterday AI’s red-letter day.

From The Wall Street Journal • May 21, 2026

This was a red-letter day in the history of Liverpool's famous old stadium as the new top deck of the Anfield Road Stand was in use for the first time.

From BBC • Dec. 17, 2023

Could Feb. 15 be a red-letter day for Nikki Haley?

From Washington Times • Feb. 7, 2023

Saturday was a red-letter day for the history of art in Southern California.

From Los Angeles Times • Jun. 21, 2022

“This is a red-letter day,” my father agrees.

From "Al Capone Does My Shirts" by Gennifer Choldenko