How to generate current date and time?

Hi, Anna.

Thank you for reaching out!

I'm not sure if you're asking a generic question on copying variables or specifically asking about the Javascript example in the video posted. 

When you create the variable, you can insert a textbox with a reference to the variable (it will look like %variablename%). If you copy and paste that textbox to other slides, does it work?

I am not familiar with Javascript, so hopefully others from the community will chime in, but executing it on the first slide should still apply to other slides that reference that variable.

Let me know if this works!