I am working on a project that involves re-randomizing our sample every month. As could be expected, I want to include the name of the month in many of the variable names (e.g., treatment_Mar, treatment_Apr, etc.). However, I will be running the do-file for month M in the preceding month, M-1. Is there a way to create a local of next month's name? Because c(current_date) is a string, I'm stumped as to how I can add to/subtract from it.