IRS Payment Processing Date Later Than Estimated Tax Due Date

Hi Members:

Today is Saturday, January 14th, 2023.

I logged into the IRS website to pay Estimated Quarterly Taxes that are due on Monday, January 16th.

When I get ready to submit my payment, it shows the payment date as Tuesday, January 17th.

What should I do?

Do I pay today, knowing it will be for the 17th?
Do I wait until Monday, and hopefully it will post on the 16th instead?
And if it turns out that it won't be processed until the 17th, am I going to get charged a penalty fee?

Thank you for your help!
Dolce