We have set an EventBridge to trigger a Lambda. It should run every day at 9:30AM Local time (US EST/EDT in my case). The problem is the date seems to be set in EventBridge by UTC. Is there a way to get this to always be based on a specific timezone? IE 9:30AM regardless of the season?
2 Answers
Sadly, you can't do this, as only UTC time zone is used:
All scheduled events use UTC time zone and the minimum precision for schedules is 1 minute.
You would need custom solution for what you want to do. For example, let AWS EventBridge trigger a lambda function and the function evaluates what else should be triggered based on its conversions of UTC to local times.
Either schedule another event to adjust the first event, or execute the lambda at both 9:30 EST and 9:30 EDT and have the lambda figure out which one should run.
Run another lambda at 2am and 3am local time that can adjust the schedule of the first lambda for daylight saving time. You can use the lambda language's implementation to decide whether the event needs to be adjusted.
You could also schedule your original lambda to run at both the daylight-saving-adjusted and the non-adjusted time (so 14:30 UTC for EDT and 13:30 UTC for EST). Then the lambda could decide whether it was the proper time to execute based on a calendar check.
I prefer the first option because it's a clearer separation of duties.
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