From the documentation of SQS, Max time delay we can configure for a message to hide from its consumers is 15 minutes - http://docs.aws.amazon.com/AWSSimpleQueueService/late
Visibility timeout can do up to 12 hours. I think you can hack something together where you process a message but don't delete it and next time it is processed its been 12 hours. So a queue with one message and visibility timeout of 12 hours. That gets you a 12 hour cron.
Two thoughts.
The simplest way to do this is as follows:
SQS.push_to_queue({perform_message_at : "Thursday November 2022"},delay: 15 mins)
Inside your worker
message = SQS.poll_messages
if message.perform_message_at > Time.now
SQS.push_to_queue({perform_message_at : "Thursday November
2022"},delay:15 mins)
else
process_message(message)
end
Basically push the message back to the queue with the maximum delay and only process it when its processing time is less than the current time.
HTH.
Cloudwatch is likely a better way to do it. You can use a createEvent API with the timer, and have it trigger either a lambda function or an API call to whatever comes next.
Another way to do is to use the "wait" utility in an AWS step function.
https://docs.aws.amazon.com/step-functions/latest/dg/amazon-states-language-wait-state.html
In any case, unless you are extremely sure you will never need anything more than 15 minutes, the SQS backdoor to add the delay seems hacky.