The short answer: Press and hold the left and right arrow buttons simultaneously for about three seconds until the display starts flashing, then use the arrow buttons to set the correct hour, press the enter or checkmark button, set the minutes, and press enter again. If your Rain Bird has a dial, turn it to the “Set Current Time” or “Current Date/Time” position first. The exact steps vary slightly by model, but most Rain Bird controllers follow this general pattern. Getting the clock right is essential because your entire watering schedule depends on it. If the time is wrong, your sprinklers will run at the wrong time of day, potentially watering during peak heat or violating local watering restrictions.
Why Getting the Clock Right Matters More Than You Think
Your sprinkler controller’s clock isn’t just for display. It controls when every zone runs. If the clock shows 6:00 AM when it’s actually 8:00 AM, your “early morning” watering is actually happening mid-morning when the sun is already heating up. That means more evaporation, less water reaching the roots, and higher water bills for worse results.
In Tulsa, the best time to water is between 4:00 AM and 8:00 AM. Watering during this window minimizes evaporation, allows grass blades to dry before evening (reducing disease risk), and ensures water soaks into the soil before the heat of the day. If your clock is off by even a couple hours, you’re undermining your entire irrigation strategy.
Setting the Clock on Rain Bird Controllers with a Dial
Many popular Rain Bird models like the ESP-TM2, ESP-Me, and older ESP series use a dial to navigate between functions. Here’s how to set the clock:
Step 1: Turn the dial to the “Set Current Date/Time” position. On some models this is labeled “Current Time” or has a clock icon.
Step 2: The hour will be flashing. Use the plus (+) and minus (-) buttons to adjust to the correct hour. Pay attention to AM and PM.
Step 3: Press the right arrow button to move to minutes. The minutes will now flash.
Step 4: Use plus and minus to set the correct minutes.
Step 5: If your model requires setting the date, press the right arrow again and set the month, day, and year using the same method.
Step 6: Turn the dial back to the “Run” or “Auto” position. The clock is now set, and your programmed schedules will run at the correct times.
Setting the Clock on Button-Only Rain Bird Controllers
Newer Rain Bird models and some indoor controllers don’t have a dial. Instead, they use button combinations:
Step 1: Press and hold the left arrow and right arrow buttons at the same time for about 3 seconds. The time display should start flashing.
Step 2: Use the arrow buttons to adjust the hour. Some models use up/down arrows; others use left/right.
Step 3: Press the checkmark, enter, or program button to confirm the hour and move to minutes.
Step 4: Adjust minutes with the arrow buttons.
Step 5: Press enter/checkmark again to save. The display should stop flashing, indicating the time is set.
WiFi-Connected Rainbird Controllers
If you have a WiFi-enabled Rainbird controller connected to the Rainbird app, the clock typically syncs automatically with your phone or the internet. You shouldn’t need to set it manually. However, if the WiFi connection is lost, you may need to reconnect or set the time manually using the steps above.
To verify the time is correct on a WiFi model, open the Rainbird app and check the controller status. If it shows the wrong time, try reconnecting the WiFi or power cycling the controller by turning off the power for 30 seconds and turning it back on.
Common Clock-Setting Problems and Solutions
Clock resets after power outage: Most Rainbird controllers have a backup battery (usually a 9V or lithium battery) that maintains the clock during power outages. If your clock keeps resetting, the backup battery may be dead. Replace it and reset the time.
Can’t get the display to flash: Make sure you’re holding both buttons long enough (3+ seconds). If it still won’t respond, check that the controller has power and try the dial method if your model has one.
Time is off by exactly one hour: This usually means the controller didn’t adjust for daylight saving time. Some models auto-adjust; others don’t. Manually correct by adding or subtracting one hour.
Display shows wrong AM/PM: When setting the hour, watch the AM/PM indicator carefully. It’s easy to accidentally set 6:00 AM when you meant 6:00 PM, which means your sprinklers would run in the evening instead of the morning.
After Setting the Clock: Verify Your Schedule
Once the clock is set correctly, take a moment to verify your watering schedule is still programmed correctly. Sometimes when the clock gets reset, the program schedules get cleared too. Check that your start times, run times for each zone, and watering days are all still set the way you want them.
If your schedule was lost, you’ll need to reprogram the controller. This involves setting which days to water, what time to start, and how long each zone should run. If you’re not sure what settings are right for your lawn, a professional irrigation inspection can help determine the optimal schedule for your specific system and landscape.
Need Help With Your Irrigation System?
For more than 25 years, Complete Lawn Care has been serving the Tulsa area with professional lawn care and irrigation services. While setting your sprinkler clock is something most homeowners can handle themselves, we know that irrigation systems can be complicated. If you’re dealing with a controller that won’t cooperate, zones that won’t turn on, or a system that just isn’t watering evenly, our irrigation repair and maintenance services can help.
We service all major sprinkler brands, including Rain Bird, Hunter, Toro, and Orbit. Whether you need a simple adjustment, a controller replacement, or a full system diagnosis, we can help your irrigation system work the way it should.
The Bottom Line
Dial models: Turn to “Set Current Time” and use the +/- buttons to adjust.
Button models: Hold the left and right arrows for 3 seconds, then adjust with the arrows.
WiFi models: The clock should sync automatically when connected.
Replace the backup battery if your clock keeps resetting after power outages.
Irrigation Problems Beyond the Clock?
Complete Lawn Care offers professional irrigation repair, maintenance, and seasonal startup services throughout the Tulsa metro area. If your sprinkler system needs more than a clock adjustment, we can diagnose the problem and get your system running efficiently.
Phone: (918) 605-4646
Email: [email protected]
Online: completelawncaretulsa.com/get-a-quote
Proudly serving Tulsa, Broken Arrow, Owasso, Jenks, Bixby, Sand Springs, and surrounding Oklahoma communities since 2000.