Home > Personal > Personal Lending > Mortgage > Mortgage Resources > Glossary > Adjustment Period Adjustment Period November 9, 2021 The period that elapses between the adjustment dates for an adjustable rate mortgage (ARM).You Might Also Like: Family MattersPreparing Financially for a Baby Everyday MoneyBudget Friendly Ideas for Thanksgiving Everyday MoneySenior Discounts and Savings Everyday MoneyStarting an Emergency Savings Account Living QuartersQuestions to Ask Your Home Inspector