Long-range plans still arrive as pairs of dates. A grant runs March 1, 2021 through February 28, 2028. A warranty starts the day you bought the laptop. HR asks how many years sit between hire and review. Everyone subtracts the year numbers in their head and hopes leap years do not matter. The form above is the quick correction: real start, real end, a year count you can paste into a deck footnote.
The answer comes from calendar days between the dates, converted with an average year length—so decimals are normal and "2028 minus 2021 equals seven" is not automatically the same thing. The detail line shows the day total underneath; when legal wants days, run the March 1, 2021 to February 28, 2028 span in days and keep both figures in the thread.
Adding five years forward from one anchor—anniversaries, vesting cliffs, kid-grade planning—is a different shape. Use five years forward from May 9, 2026 on the from-now page when only the start and a duration are named, not two fixed endpoints.
End year minus start year is the trap
Labels on a chart hide partial years. A lease from July 2024 through June 2029 touches five calendar year numbers but is not always "five years" in every contract definition. Running the actual endpoints once beats arguing from subtraction.
A cleaner round check: January 1, 2020 through January 1, 2026 lands near six elapsed years on this scale—handy when a board deck says "six-year trend" and someone only typed the year labels. Shorter planning slices still show up in quarter talk; the January 1 through June 30, 2026 window in quarters is the parallel when the meeting stays in Q1/Q2 language.
Leap years and reversed fields
February 29 in the range is a reminder that calendar days are doing the work, not a tidy "365 times N" guess. If you typed the later date as the start, swap the fields before you screenshot—the math recovers, the wording might not.
Before the number goes into a grant table or a slide, copy both source dates beside the years value. If endpoint wording is fuzzy (inclusive last day or not), the day count can move by one on the date difference view with include-end—small shift, big fight in compliance chat.
- Contract "years" may mean anniversary dates—confirm the document.
- Decimals mean a partial year; do not round up silently in headlines.
- Very long spans: sanity-check against a wall calendar after you estimate.
Multi-year grants and career arcs are where this page earns its keep; the long-range year planning note walks through inclusive counting without turning the page into a manual.
Ordinary planning math, not legal or tax advice. When the span matters, keep the two dates with the answer.