Adding 15 months to today’s date means crossing more than one calendar year in most cases. The simplest method is to add one full year first, then count three more months forward. Because months vary between 28 and 31 days, this two-step approach produces an accurate result without requiring individual day counts along the way.
Lease agreements, extended warranties, and some loan introductory periods run to 15 months because the duration extends past the annual renewal cycle. Landlords sometimes offer 15-month lease terms specifically to shift the renewal date away from competitive rental seasons, and for commitments that extend across full years, 15 years from today represents the long-term horizon that mortgage and investment planning targets. Both windows share the same number but serve very different commitment lengths.
Frequently Asked Questions
Yes, 15 months is one year and three months. The first 12 months complete one calendar year, and the remaining three push the result into the following year's first, second, or third quarter depending on the starting month.
Fifteen months suits extended lease agreements, manufacturer warranties beyond the standard one-year term, and promotional loan periods. The length gives a structured timeline that clears the annual review point by a meaningful margin.
Add one year to today's date first, then count three additional months forward. This avoids the complexity of tracking variable month lengths one at a time. Verify the result if the starting day falls on the 29th, 30th, or 31st, since not every target month contains those dates.
It was one year and three months before today. Subtract one full year first, then move back three months. The exact date depends on the starting month, particularly when the starting day does not exist in the target month.