Why Did My JellyFish Lighting Schedule Stop Running After Daylight Saving Time?
- Timezone/DST not handled correctly
- App/cloud DST bug
- Controller clock not adjusting
Problem Description
After daylight saving time (DST) changes in spring or fall, JellyFish lighting schedules shift by one hour or stop triggering entirely because the controller's internal clock did not update correctly or the schedule references an absolute time that no longer matches the intended lighting window.
Why This Happens in Real Homes
JellyFish schedules going wrong after daylight-saving time is a clock-handling issue — if the timezone/DST isn't set correctly or the app/cloud mishandles the transition, fixed schedule times end up an hour off, or events stop firing at the expected time. It's the classic twice-a-year smart-home DST problem.
Verify the timezone and daylight-saving settings in the app are correct for your location, and update the app in case a DST bug was fixed. Confirm the controller's clock actually adjusted after the change, and re-check (and re-save) your schedule times, since fixed times may need nudging. If you use sunrise/sunset events, those adjust automatically with daylight but can need their offsets reviewed. Re-syncing after the transition realigns everything.
Symptoms
- Schedule stopped after DST
- Times wrong after daylight saving
- Off by an hour after DST
- Schedule broke on the time change
- Events at the wrong time post-DST
- DST shifted the schedule
- Timing wrong twice a year
- Schedule misfires after DST
Recognize these? Here's what usually causes it.
Common Causes
- Timezone/DST not handled correctly
- App/cloud DST bug
- Controller clock not adjusting
- Fixed times not shifting with DST
- Location/timezone misconfigured
- Sunrise/sunset offset affected
- App needs updating
- Sync issue after the time change
Most fixes happen in the first 3 steps.
JellyFish schedules use the controller's internal clock for local execution. If the controller is offline when DST occurs, it may not receive the time update and will continue using the old time until it reconnects and syncs with NTP.
Tools & Requirements
Step-by-Step Solution
Use Sunrise/Sunset Schedules for All Exterior Lighting
Fixed-time schedules require seasonal adjustment twice per year. Sunset/sunrise triggers are set-it-and-forget-it — the controller automatically calculates the correct trigger time based on your GPS location and the current date. This is the recommended schedule type for permanent outdoor lighting.
DST Happens Twice a Year
In the US: clocks spring forward 1 hour in March and fall back 1 hour in November. If your JellyFish schedules are fixed-time, add a calendar reminder to check and update them the Monday after each DST change.
Check All Zones Separately
If you have multiple zones with separate schedules, each zone schedule needs to be verified after a DST change. A schedule update on one zone does not automatically update other zones.
Quick Solutions
Still having issues? This is usually the deeper cause below.
Schedules that skip randomly are usually a daylight-saving holdover — delete and recreate the schedule to clear the corrupted entry.
Switching to sunrise/sunset triggers is a one-time setup that permanently eliminates DST-related schedule drift. Most JellyFish owners who make this change never experience a seasonal schedule issue again.
Thermostat issues that keep returning are often caused by stale backup-battery memory holding old settings across power cycles without the user realising.
- Timezone/DST not handled correctly
- App/cloud DST bug
- Controller clock not adjusting
- Fixed times not shifting with DST
- Location/timezone misconfigured
Before you go — try one of these (they fix most cases).
Official Manufacturer Manual
JellyFish Lighting provides official product documentation through their online manual rather than downloadable PDF. Access setup guides, troubleshooting steps, and product specifications for your JellyFish Lighting System.
Source: jellyfishlighting.com
Need More Help? JellyFish Lighting Support
Note: The contact information below connects you directly to JellyFish Lighting's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.
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