Illustrative example. The dates and amounts below are provided for practice.
A couple wants the first day of their relationship to appear as Day 1. They enter January 1, 2027 as both Relationship Start Date and Calculate Until Date.
The results show Total Elapsed Days 0 and Inclusive Day Number 1. No calendar boundary has been crossed, but the first date belongs to an inclusive sequence.
Watch what changes tomorrow
Set the end date to January 2. The elapsed total becomes 1 and the inclusive number becomes 2. The relationship start stays January 1.
Choose Inclusive day numbers if milestone dates should treat the first date as Day 1. With that convention, Day 100 is April 10, 2027. Under elapsed counting, 100 completed days land on April 11.
Use “Day 100 together” for the inclusive target and put the convention in the note. A vague title such as “100 days” can cause a disagreement later.
A yearly anniversary still falls on January 1. Switching milestone counting does not move that calendar anniversary. Keep the annual event separate from any one-time day-number celebration so future reminders preserve the distinction.