Automation with custom time from dashboard?

I made an "alarm clock" light automation for my child's room.

In short I have a hue-light within lamp shade in the form of a bunny. It functions as a night light for the child, so the automation is very basic with a set time in the evening when it turns on and then a set time in the morning when it will switch to GREEN color which indicates for her that it's time to (or rather ok to) get up. So it's a sleep training aid / alarm clock.

Now to my question, my skills are limited so I don't know how to go about this part.

Is there any way to add a card (custom?) to the dashboard where I can manually enter a time and then edit the automation so the green light goes on at the specified time from the dashboard?

Meaning we want an easy way from dashboard to set the time for the green light to go on.