English · Slang Attested

Star Trek Day

In real, traceable use. Part of the curated seed collection; community review is coming.

Sense 1

Meaning · English

Synonym of First Contact Day (“5th of April, an annual day for Trekkies to celebrate Star Trek”).

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).

Sense 2

Meaning · English

8th of September, an annual day for Trekkies to celebrate Star Trek; representing the anniversary of the day that the first episode of Star Trek: The Original Series, “The Man Trap”, aired in 1966.

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Topics: Sun & moon

Common questions

What does “Star Trek Day” mean?

Synonym of First Contact Day (“5th of April, an annual day for Trekkies to celebrate Star Trek”).

Is “Star Trek Day” formal or informal?

Star Trek Day is generally slang.