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AWS EventBridge & CloudWatch 6-Field Cron Builder

💡 AWS Rule: You cannot specify both Day-of-month and Day-of-week using '*'. If you use a value in one field, you must use '?' in the other.
cron(0 10 ? * MON-FRI *)

AWS EventBridge & CloudWatch 6-Field Cron Builder

4.91•460K Users•100% Client-Side Privacy
Unlimited Free

Construct 6-field cron expressions for AWS EventBridge and CloudWatch Rules with the mandatory ? wildcard validation.

6-field AWS cron formatEventBridge ? wildcard ruleYear and Day-of-week fields1-click copy

How to Use AWS EventBridge & CloudWatch 6-Field Cron Builder

Follow these simple steps to process your files securely in browser memory.

1Step 1 of 3

Configure Minute, Hour, Day, Month, Year Fields

Adjust EventBridge 6-field cron syntax: Minutes (0-59), Hours (0-23), Day-of-month (1-31), Month (1-12), Day-of-week (1-7 where 1=SUN), and Year.

Pro Tip: EventBridge requires exactly 6 fields, unlike standard 5-field Unix cron.
2Step 2 of 3

Automatic "?" Wildcard Enforcement

The builder automatically assigns "?" to either day-of-month or day-of-week to satisfy AWS validation rules.

Pro Tip: AWS EventBridge throws an error if both day fields use "*" or values; one MUST be "?".
3Step 3 of 3

Copy Valid cron() Expression & Schedule Forecast

Copy the valid cron(...) string and paste into AWS EventBridge, CloudFormation, or CDK.

Pro Tip: All AWS EventBridge cron schedules run strictly in UTC timezone.

Who Is AWS EventBridge & CloudWatch 6-Field Cron Builder Built For?

Designed for professionals seeking fast, private, and unlimited client-side execution.

Primary Target Audience
🎯Serverless Engineers, Cloud Developers & DevOps
Also Widely Used By
AWS Solutions ArchitectsData Pipeline Leads
Typical Real-World Use Cases
  • Building valid AWS EventBridge 6-field cron expressions
  • Handling mandatory "?" wildcard rules between day-of-month and day-of-week
  • Simulating Lambda function and Step Function execution schedules

Automatic ? Wildcard Compliance

Eliminates AWS syntax rejection errors permanently.

6-Field EventBridge Syntax

Minute, Hour, Day-of-month, Month, Day-of-week, Year.

CloudFormation & CDK Ready

Outputs clean cron(...) strings ready for Infrastructure as Code.

Frequently Asked Questions about AWS EventBridge & CloudWatch 6-Field Cron Builder

AWS includes Year as the 6th field (e.g. 2026 or *) and requires a "?" wildcard in either Day-of-month or Day-of-week to avoid day conflicts.
Top Search Queries for AWS EventBridge & CloudWatch 6-Field Cron Builder:
aws eventbridge cron builder generator 6 fieldeventbridge cron question mark wildcard validatoraws lambda scheduled event cron buildercloudwatch events cron expression maker onlineaws 6 field cron syntax generator

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