In my Riverside ranch house, I used to leave the sprinkler timer alone once I had settled on a schedule. The days and minutes were already set; it was easy to treat them as the lawn’s standing order. As of mid-September 2026, with fall ahead, that old habit is the one I’m questioning here in California. A timer can keep following its settings even when the lawn no longer needs the same amount of water.
In Riverside, Riverside Public Utilities and its water-district partner once used the daylight-saving clock change to remind customers to check their sprinkler timers. Their archived reminder makes a useful prompt for me: look at the watering days and minutes instead of assuming the settings are still right. The clock change is a reminder to check, not the reason a lawn needs a different schedule.
What the EPA says
The US EPA’s WaterSense guidance puts the basic advice plainly: “Irrigation schedules should be adjusted based on seasonal changes.” That is a reversal of the set-it-and-leave-it approach. The timer’s job is to follow its settings, but those settings need to reflect what the landscape needs now, not just what it needed when I last touched them…