red-letter day
Speech parts
1. red-letter day - Noun
2. red-letter day - Phrase
Meaning
a memorably happy or noteworthy day (from the custom of marking holy days in red on church calendars)
Source: WordNetAlternative names
red letter day
Synonyms
jubilee
festival
anniversary
holiday
public holiday
feast day
holy day
bank holiday
day of days
red letter date
Antonyms
Hypernyms
Examples
May 12 this year is a red-letter day for Bangladesh when the country ushered in a new era by launching its first "Bangabandhu-1" satellite.
When something special happens, it’s called a red-letter day.