Let's Go to Golgotha! is a 1975 science fiction

Science fiction

Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities...

 story by Garry Kilworth

Garry Kilworth

Garry Douglas Kilworth is a fantasy and historical novelist.Kilworth is a graduate of King's College London. He was previously a science fiction author, having published one hundred twenty short stories and seventy novels...

, published in a collection of the same name.

In the future period where the story takes place, time travel

Time travel

Time travel is the concept of moving between different points in time in a manner analogous to moving between different points in space. Time travel could hypothetically involve moving backward in time to a moment earlier than the starting point, or forward to the future of that point without the...

 has been invented and made commercially available. Among other historical events, tourists can book a time-traveling "Crucifixion

Crucifixion of Jesus

The crucifixion of Jesus and his ensuing death is an event that occurred during the 1st century AD. Jesus, who Christians believe is the Son of God as well as the Messiah, was arrested, tried, and sentenced by Pontius Pilate to be scourged, and finally executed on a cross...

 Tour." Before setting out, the tourists are strictly warned that they must not do anything to disrupt history. Specifically, when the crowd is asked whether Jesus or Barabbas

Barabbas

Barabbas or Jesus Barabbas is a figure in the Christian narrative of the Passion of Jesus, in which he is the insurrectionary whom Pontius Pilate freed at the Passover feast in Jerusalem.The penalty for Barabbas' crime was death by crucifixion, but according to the four canonical gospels and the...

 should be spared, they must all join the call "Give us Barabbas!". (A priest absolves them from any guilt for so doing). However, when the moment comes, the protagonist suddenly realizes that the crowd condemning Jesus to the cross is composed entirely of tourists from the future, and that no actual Jewish Jerusalemites of 33 AD are present at all.