What time reference is uses for Sunset/sunrise scheduled events?

I have an exterior light switch set to turn on at 15 minutes prior to sunset. For example, today sunset for my location was 8:01. 15 minutes prior would be 7:46. However, the light came on at 7:41.

I know this is not a major deal, but I am curious what method or source Wyze uses to determine sunrise and sunset?

Or, am I doing something wrong?

I’ve found that the sunrise/sunset time gets updated once a week, so the timing will be the same for 7 days and then adjust for the next 7 days. For me I believe the update has been sometime after my Saturday night sunset triggers run and before my Sunday night sunset triggers run. I haven’t used these triggers since April though as with the long summer light hours I haven’t needed them.

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