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Fixing Day Display Error on Rain Bird ESP-16LX Plus Controller

When your Rain Bird ESP-16LX Plus shows the wrong day after setting the time and date—typically one day ahead—the controller's memory may hold corrupted program data. A full reset clears this and restores proper day tracking.

Reset Procedure

Turn the dial to OFF.
Press and hold ON and MAN.START/ADV simultaneously for ~10 seconds.
Watch for INITSYS scrolling across the display.
When the last digit of "SUN 12:00am" flashes, the reset is complete.

After Reset

Re-enter the correct time, date, and watering schedules. The day should now advance correctly. If the error persists after a proper reset, the controller's real-time clock circuit may be failing, warranting replacement.

This reset also clears any hidden programming conflicts that can cause erratic scheduling. It's the first step Rain Bird support recommends for date/time anomalies.

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