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Date Range Splitter
Split a half-open calendar date range into fixed-day or balanced positive intervals with exact complete coverage.
Strict start and exclusive end YYYY-MM-DD dates
Complete JSON interval report
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
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How to use this tool
- Enter Start date and a later Exclusive end date.
- Choose Fixed days or Balanced chunk count and enter the corresponding positive whole number.
- Select Split date range and download date-intervals.json.
Examples
For [2024-01-01,2024-01-10) with four-day chunks, intervals end exclusively on January 5, January 9 and January 10.
Limitations
- Years 0001 through 9999, 128 total input UTF-16 units, at most 1,000 intervals, fixed days from 1 through 36,500, 1 MiB report and 30 seconds.
- Start must be before end. Balanced count cannot exceed total days. Fixed seven-day chunks start on the supplied start date, not a locale week boundary.
- No calendar-month/year chunks, business-day rules, DST or recurrence engine. An exclusive end of year 10000 is unavailable, so this domain cannot include 9999-12-31.
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