1. red-letter - Adjective
2. red-letter - Adjective Satellite
Of or pertaining to a red letter; marked by red letters.
Source: Webster's dictionaryred letter
The red-letter days, now become, to all intents and purposes, dead-letter days. Charles Lamb
on red-letter nights a large gathering greeted the celebrity Source: Internet
Another red-letter date has been added to Australia's already crowded electoral calendar, after Annastacia Palaszczuk yesterday initiated a short and sharp four-week state election campaign in Queensland. Source: Internet
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. Source: Internet
When something special happens, it’s called a red-letter day. Source: Internet