AWS EventBridge Cron Timezone - Fire on Specific Local Time
Jul 24
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?
1 answer
Accepted answer · original discussion
Jul 25
Updated: November 2022
Use EventBridge Scheduler as it allows you to schedule events at specific date-time along with timezone. Also supports one-time schedules.
Introducing Amazon EventBridge Scheduler - AWS Blog
Original: July 2021
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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