Create dynamic date

Hi everyone, does anyone know how to make sequential dates by month, in the user table there are dates that must be added to another table, so I made an add row action, the first input is based on a date, for example 1 June 2023, the second input must be 1 August 2023 onward September 1, 2023 onwards.
how can this be achieved?

@Jeff_Hager has a good solution for adding any number of months to a date. See below: