NINEHOUND / CALENDAR & CULTURE TOOLS
Find the next occurrence of a birthday or anniversary, including today.
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WORKED EXAMPLE
Gregorian date：2000-02-29 · As of：2025-01-01 · February 29 rule：No substitution
1154 days from 2025-01-01 · Anniversary 28. February 29 convention: February 29 only
Uses the Gregorian month and day. For February 29 choose leap years only, February 28, or March 1 in ordinary years.
Enter the original date and a reference date to get the next date, days remaining and anniversary number. An occurrence today returns zero days.
Explore the calendar here. Find NineHound’s founder, Lao Heshan Daoren / Sun Xingzhe, and the wider I Ching and life-chart project.
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