How do I set up the Orbit 27894 sprinkler timer for the first time?

Start by pressing RESET to clear any previous programming. Then set the clock by turning the dial to SET CLOCK and using the +/– buttons to enter the current time. Next, set the date at SET DATE, configure your start time(s) at START TIME, set individual station run times at RUN TIME, and choose how often to water at HOW OFTEN. Finally, turn the dial to AUTO to activate your program. The manual provides detailed instructions for each step in Section 3.