# Services from datetime.openverbs.com on Zero

> datetime.openverbs.com serves 13 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/datetime.openverbs.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/datetime.openverbs.com/health.json

## Services

- [Business Days Calculator](https://www.zero.xyz/c/business-days-calculator-d33a7988/llms.txt): $0.002/call via x402. Add or subtract business days to a date, or count business days between two dates, skipping weekends and optional custom holidays.
- [datetime.openverbs.com Add Duration](https://www.zero.xyz/c/datetime-openverbs-com-add-duration-49a9ed43/llms.txt): $0.002/call via x402. Adds (or subtracts) an ISO 8601 duration to a start date or datetime, returning the resulting UTC instant with calendar-aware handling of month/year boundaries.
- [datetime.openverbs.com Timezone Converter](https://www.zero.xyz/c/datetime-openverbs-com-timezone-converter-88a3a2ac/llms.txt): $0.002/call via x402. Converts an ISO 8601 datetime to a target IANA timezone, returning the converted time with UTC offset, weekday, and Unix timestamp.
- [Easter Date Calculator (Gregorian)](https://www.zero.xyz/c/easter-date-calculator-gregorian-d3f1ff2e/llms.txt): $0.004/call via x402. Computes the exact date of Western (Gregorian) Easter Sunday for any year between 1583 and 9999 using the Anonymous Gregorian computus algorithm.
- [datetime.openverbs.com – Date/Time Difference Calculator](https://www.zero.xyz/c/datetime-openverbs-com-date-time-difference-calculator-09f98ae7/llms.txt): $0.002/call via x402. Computes the calendar breakdown (years, months, days, hours, minutes, seconds) and total seconds between two ISO 8601 dates or date-times, flagging negative results when end precedes start.
- [Gregorian Date to ISO Weekday Lookup](https://www.zero.xyz/c/gregorian-date-to-iso-weekday-lookup-d4ad7a8d/llms.txt): $0.004/call via x402. Returns the ISO weekday number (1=Monday through 7=Sunday) and its name for a given Gregorian calendar date.
- [Julian Day Number to Gregorian Date Converter](https://www.zero.xyz/c/julian-day-number-to-gregorian-date-converter-2750fdb8/llms.txt): $0.004/call via x402. Converts a Julian Day Number (JDN) to its proleptic-Gregorian calendar date, ISO weekday number (1=Monday..7=Sunday), and weekday name.
- [ISO 8601 Duration Humanizer](https://www.zero.xyz/c/iso-8601-duration-humanizer-ce463996/llms.txt): $0.002/call via x402. Converts an ISO 8601 duration string (e.g. 'P1Y2M10D') into a readable English phrase with correct pluralization and descending component order.
- [Day-of-Year Calculator](https://www.zero.xyz/c/day-of-year-calculator-72ffebcf/llms.txt): $0.004/call via x402. Returns the ordinal day of the year (1–366), total days in that year, and whether the year is a leap year for a given Gregorian date.
- [ISO 8601 Duration Parser](https://www.zero.xyz/c/iso-8601-duration-parser-a70afe81/llms.txt): $0.002/call via x402. Parses an ISO 8601 duration string into its component parts and returns a normalized ISO string plus totalSeconds (null when years or months are present).
- [ISO Week Number Lookup](https://www.zero.xyz/c/iso-week-number-lookup-8fc7bd91/llms.txt): $0.004/call via x402. Returns the ISO 8601 week-numbering year, week number (1–53), and weekday (1=Monday…7=Sunday) for a given Gregorian calendar date.
- [Gregorian Date to Julian Day Number Converter](https://www.zero.xyz/c/gregorian-date-to-julian-day-number-converter-862b06bd/llms.txt): $0.004/call via x402. Converts a proleptic-Gregorian calendar date (year, month, day) to its Julian Day Number (JDN), the integer count of days since JDN 0.
- [ISO 8601 Duration String Formatter](https://www.zero.xyz/c/iso-8601-duration-string-formatter-5ea61208/llms.txt): $0.002/call via x402. Assembles a valid ISO 8601 duration string (e.g. P1Y2M10DT2H30M) from individual numeric components (years, months, weeks, days, hours, minutes, seconds) and an optional sign.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

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