I think it’s a waste of WU for something so simple. I needed a break and decided to make a plugin for you as practice.

TCH - Change Dates Plugin | Bubble

It does what you want, take a list of dates and changes it to the new date. It’s a simple action that runs a simple function. I included a WF trigger for when the conversion is done.

Disclaimer, I do use AI to help me write code but it’s only because I cannot be bothered to remember keywords and methods.