What timezone does AWS EventBridge cron run in?

All AWS EventBridge cron expressions evaluate in UTC (Coordinated Universal Time) by default unless an explicit EventBridge timezone is configured.

Updated: August 2026 • Verified v1.2

Crontab to AWS EventBridge / CloudWatch Cron Converter

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Syntax Mapping: POSIX [m h dom mon dow] ➔ AWS [cron(m h dom/? mon dow/? *)]

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Understanding Your Results

Translates cron syntax into AWS EventBridge 6-field `cron(...)` expressions, enforces the mutual exclusion rule between Day-of-month and Day-of-week using `?`, and generates AWS CLI, Terraform, and AWS CDK deployment snippets.

Practical Guidance & Next Steps

AWS EventBridge rules mandate that either Day-of-month or Day-of-week MUST be a question mark (`?`), and Sunday is represented as 1 (or `SUN`).

What is this?

An AWS cloud architecture utility that translates Linux crontabs into AWS EventBridge scheduled rule expressions.

How does it work?

1. Enter a 5-part crontab expression and rule name. 2. Instantly generate the 6-field `cron(...)` AWS expression. 3. Copy the expression, AWS CLI command, or Terraform HCL in 1 click.

Why use it?

Eliminates syntax errors caused by AWS's unique 6-field cron and question mark (`?`) rules.

Technical Scope & Calculation Limitations

Translates standard 5-part POSIX cron syntax into AWS 6-part cron format.

Frequently Asked Questions

AWS EventBridge adds a 6th field for Year (e.g. `*` or `2026`). Furthermore, AWS requires using a question mark (`?`) in either the Day-of-month or Day-of-week field to indicate that the field is unspecified.

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