12 April
A list of events which occurred on the 12th of April.

Ivan Ditmars is born.

Irving A. Feinberg is born.

Oscar Katz is born.

Johnny Miller is born.

Charles Napier is born.

April Tatro is born.

Charles Gunning is born.

Marlene Sosebee is born.

Tracy Tormé is born.

Jay Baker is born.

Brent Hinkley is born.

Robert Justman submits a story idea to Gene Roddenberry, which will be later developed into .

Michael Wiseman is born.

Alicia Coppola is born.

The Third UK Story Arc continues in Joe 90: Top Secret #13 with the third of four installments.

Matt E. Levin is born.

Jennifer Morrison is born.

Alden Adair is born.

First day of filming on .

Fourth day of filming on .

Third day of filming on .
Musical score for  is recorded.

Bethany Michelle Curry is born.
Final draft script for  is submitted.
First day of filming on .
Third day of filming on .

Eleventh day of filming on .
Seventh day of filming on .

Second day of filming on .

Fifth day of filming on .

Eleventh day of filming on .
The score for  is recorded at the Sony Pictures Scoring Stage.
 airs on Sky One in the United Kingdom.
CIC Video releases Next Generation volume 2.2, Deep Space Nine volume 7.2 and Voyager volume 5.2 on VHS in the UK. 

Christopher Pettiet dies.

Second unit and insert shots are filmed for .

 premieres in Japan.

Bob Miles dies.

Remastered version of  airs.

Sixty-fifth day of filming on .

The season 2 opening episode of -remastered,  is broadcast on television in Flanders, the Dutch-speaking part of Belgium. The episode was aired twice on the state channel Canvas (formerly BRT 2) in the morning time slot 10:20-11:05 am and the sub-prime time slot 18:21-19:05 pm. As usual in Flanders, the episodes are not dubbed, but subtitled and, as a state channel, without commercial breaks. Canvas observed the usual broadcast order of the episodes of the season. Belgium's northern Dutch speaking neighbor, The Netherlands, has never aired the series, remastered or otherwise.

IDW Publishing releases issue #7 of Star Trek: Boldly Go.

 airs.

Unknown year
Claudia La Grippe is born.

de:12. April
es:12 abril
it:12 aprile
nl:12 april
pt:12 de abril
ru:12 апреля
sv:12 april