First Contact Day
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
April 5th, an annual occasion to celebrate Star Trek.
Register: slang
Where it’s used:
Used
American English
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “First Contact Day” mean?
April 5th, an annual occasion to celebrate Star Trek.
Is “First Contact Day” formal or informal?
First Contact Day is generally slang.