is there a specific day when the grandfathered cognito m2m pricing changes?

Hi,

The AWS Cognito pricing page, in the Pricing table for Amazon Cognito add-ons section, confirms that it is on May 9.

Any AWS account that is configured for use with Amazon Cognito M2M before 12:01 AM UTC, May 9, 2024, the day of the pricing announcement, will be exempt from pricing until May 9, 2025. The exemption will be at the AWS account ID level.

Yes, there is a specific date when the grandfathered Amazon Cognito machine-to-machine (M2M) pricing changes. According to the information provided:

1. The pricing change for M2M support will take effect on July 9, 2024.

2. Any AWS account that was configured for use with Amazon Cognito M2M before 12:01 AM UTC, May 9, 2024 (the day of the pricing announcement) will be exempt from pricing until May 9, 2025.

3. The exemption is applied at the AWS account ID level. If your AWS account had an Amazon Cognito user pool configured for machine-to-machine use (OAuth 2.0 client credentials flow with a confidential app client) before May 9, 2024, then that AWS account will be exempt from pricing until May 9, 2025.

4. Any new AWS account IDs and payer IDs created and configured for Amazon Cognito's M2M capabilities will not be charged until July 9, 2024.

So, to directly answer your questions:

• It's not on May 9 at midnight for existing customers who are grandfathered in. Their exemption lasts until May 9, 2025.
• It's not at the end of May.
• For new customers or those not grandfathered in, the pricing change takes effect on July 9, 2024.

The specific time (e.g., midnight) on July 9, 2024, is not explicitly stated in the provided information, so it would be best to assume it starts at the beginning of that day unless AWS provides more specific timing details.
Sources
Authentication service customer IAM (CIAM) – Amazon Cognito pricing – AWS
Amazon Cognito introduces tiered pricing for machine-to-machine (M2M) usage