I can help. I have done this before.

> On Apr 12, 2016, at 7:25 AM, concrete5 Community <discussions@concretecms.com> wrote:

shotrox, do you have the code or approach for this available? I'd love to make use of it on my project as well.

Back then I solved it by adding a text field attribute and build a custom block that allows adding unlimited data through appending form fields via jQuery and serialize that data into the (hidden) textarea input.
I separated the data with a specific string (like [##|##] or something)

Now I would just use the custom attribute of concrete 5 and build a custom attribute that can handle multiple inputs.

Although I still like my old solution and will still use that as it is clean and simple

Great, thank you. I was looking at doing similar to handle cron formatting for recurring dates. I'll look at doing it for the base dates as well. Kudos.

If you could make the result public the community would be greatful.

;)