I will rely on insights from Halliday’s register theory to explain the Markan Jesus’ use of a functional variety of language I call procedural register. The identification of procedural register in the main section of the Olivet Discourse (vv. 5b-23) will be shown to reveal the rhetorical design of the discourse within a first temporal horizon, of direct relevance for the audience and addressing the disciples’ question (v. 4). The absence of procedural register in vv. 24-27 indicates the opening of a second horizon in the speech, lacking immediate impact for the audience and no longer addressing the disciples’ question.