What is another word for red-letter day?
Pronunciation: [ɹˈɛdlˈɛtə dˈe͡ɪ] (IPA) 
A "red-letter day" is often defined as a significant event or milestone that is marked in some way, such as a holiday or birthday. However, there are many other words and phrases that can be used to describe these types of special days. Some synonyms for "red-letter day" include "memorable occasion," "milestone celebration," "special event," "momentous day," and "historic occasion." Additionally, other colorful expressions can be used to describe important days, such as "banner day," "big day," "red carpet day," "golden day," or even "once-in-a-lifetime day." Whatever the occasion, there are many ways to express the excitement and significance of these special moments in life.
