NINEHOUND / CALENDAR & CULTURE TOOLS
Nights elapsed or dates on the calendar? Choose whether the end date counts.
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WORKED EXAMPLE
Gregorian date：2024-02-28 · End date：2024-03-01 · Include end date：no
2024-02-28 → 2024-03-01 · End date excluded
The default interval excludes the end date. Inclusive counting adds one, so identical dates return zero or one.
Use this for itinerary dates and calendar intervals. It counts civil dates, not elapsed hours across daylight-saving changes.
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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