Invoke AWS Lambda function only once, at a single specified future time

Question

I want to be able to set a time to invoke an AWS Lambda function, then have that function be invoked then and only then. For example, I want my Lambda function to run at 9:0

Answer 1

I understand its quite late to answer this question. But anyone who wants to use CRON expression to trigger an event(or call an API) only once can use following example:

This event will be triggered only once on January 1, 2025 - 12:00:00 GMT

00 12 01 01 ? 2025

For those who do not have much knowledge of cron syntax:

Minutes Hours DayOfMonth Month DayOfWeek Year

I am using this with AWS Cloudwatch Events and the result looks like this:

Note: I did not have to specify Day of week, since I have given it a fixed date and thats obvious.