Illustrative example. The dates and amounts below are provided for practice.
A January 3 birthday can disappear from a December-only planning view even when it is only a few days away. Calculate across the year boundary before deciding your next shopping date.
Set Birthday Month to 1, Birthday Day to 3, and Calculate As Of to December 30, 2026. Leave Birth Year blank. The next birthday is January 3, 2027, Sunday, four elapsed days away.
Check the four transitions
December 31 is one day later, January 1 is two, January 2 is three, and January 3 is four. Counting December 30 itself as Day 1 would place the birthday on Day 5. The countdown uses elapsed days.
Enter a one-time preparation event before the holiday if stores or delivery services may be closed. Four calendar days do not imply four business days.
The birth year is unnecessary for finding this annual occurrence. If you want to show an age as well, add the actual year, then verify the reference date remains December 30. The next occurrence belongs to 2027 even though the review date belongs to 2026.