Twelve months is one year — the cleanest offset of the set, because the day and month stay exactly the same and only the year ticks up. Annual contracts, insurance and registration renewals, warranties, subscription terms, and anniversaries all run on it. There’s just one edge case, February 29, and one common misconception, that a year is always 365 days. The tool above confirms the date from your device’s current date.
How to calculate the date 12 months from today
Keep the day and month, add 1 to the year. Today is August 27, 2026 → August 27, 2027. The span is:
or 366 days if the twelve-month window happens to contain a February 29.
12 months vs. 52 weeks
52 weeks from today is 364 days — one or two days short of a full year. That one-day gap is why your birthday lands on a different weekday each year: the calendar year is 365 days, not a whole number of weeks. If you want the same date next year, this page is the right one; if you want a whole number of weeks, use the 52-week version.
The February 29 edge case
There’s no February 29 in a common year, so 12 months from February 29, 2028 has no exact match in 2029. Standard date math rolls it to March 1. The next real February 29 isn’t until 2032.
Sample start dates and where they land
| If today is | 12 months later |
|---|---|
| January 1, 2026 | January 1, 2027 |
| June 15, 2026 | June 15, 2027 |
| August 27, 2026 | August 27, 2027 |
| December 31, 2026 | December 31, 2027 |
| February 29, 2028 | March 1, 2029 |
What day of the week is 12 months from today?
One weekday later than today in a common year, two later if a leap day falls in the window. So this year’s Monday date is next year’s Tuesday.
Common 12-month windows
- Annual contracts, leases, and subscriptions
- Insurance, registration, and license renewals
- Warranty periods
- Anniversaries and yearly reviews
- 12-month savings and goal cycles
Shorter year-fractions are 6 months from today and 9 months from today; a year and a half is 18 months from today.
12 months from the 1st of each month in 2026
| Start date | 12 months later | Day of the week | Business days in between |
|---|---|---|---|
| January 1 | January 1, 2027 | Friday | 250 |
| February 1 | February 1, 2027 | Monday | 250 |
| March 1 | March 1, 2027 | Monday | 250 |
| April 1 | April 1, 2027 | Thursday | 250 |
| May 1 | May 1, 2027 | Saturday | 249 |
| June 1 | June 1, 2027 | Tuesday | 250 |
| July 1 | July 1, 2027 | Thursday | 250 |
| August 1 | August 1, 2027 | Sunday | 249 |
| September 1 | September 1, 2027 | Wednesday | 250 |
| October 1 | October 1, 2027 | Friday | 250 |
| November 1 | November 1, 2027 | Monday | 250 |
| December 1 | December 1, 2027 | Wednesday | 250 |
Business days count Monday to Friday after the start date, up to and including the end date, minus observed US federal holidays. That is the number to use when a deadline is written in working days instead of calendar days.