Scheduling Workflow on the Last Day of the Month

QUESTION

When scheduling a workflow to run one month after an item is changed, if the item is changed on the 31st of the month, and the following month has fewer than 31 days, when will workflow run?

ANSWER

This feature adds one calendar month. If the workflow is scheduled on May 31st, the next scheduled run date will be June 31st. However, if the resulting day is not a valid day in the resulting month (June does not have a 31st day), the last valid day of the month is used (in this example, June 30th).