Illustrative example. The dates and amounts below are provided for practice.
An anniversary card is being prepared for a wedding on September 12, 2026. The reference date is September 11, 2027, and the question is whether one year is already complete.
Choose Wedding Anniversary, enter the start and reference dates, and calculate. Completed Years is 0, Completed Months is 11, Total Days is 364, and the next anniversary is September 12, 2027, one day away.
Separate anticipation from completion
The card can say “Happy first anniversary” for tomorrow's occasion. A statement describing the interval as of September 11 should not say that a full calendar year has already passed.
Set the reference to September 12 and calculate again. One completed year and 365 elapsed days now appear. If the wedding date is inclusive Day 1, the anniversary is Day 366. The inclusive number does not change the completed-year count.
Plan the celebration date separately
If dinner is on September 13, put that date in the celebration plan. Keep the annual event anchored to September 12 so future anniversary counts remain consistent. The original wedding date, the as-of date, and the dinner date each answer a different question.