Please refer to my previous article to learn more about SharePoint Designer 2013 Workflows.
In this blog you will see how to use “Add Time to Date” action in SharePoint Designer 2013.
Description:
Adds a specific time in minutes, hours, days, or months to a date (Year is not supported), and stores the output value as a variable. The date can be a current data, specific date, or a lookup. The ‘Current Date’ value returns UTC midnight.
In this example, I have a custom list named “Custom” in which I have attached this workflow. When I run a workflow for an item it will add time to date and stores the output as text in the current item “Notes” field.
Workflow Design:
Result: