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Day of year

Return the ordinal day of the year (1..366), the number of days in that year and whether it is a leap year.

Host	datetime.openverbs.com
Price	$0.002–$0.004 per call
Network	Base
Paid endpoints listed	13
Calls, last 30 days*	26
Most unique payers on one endpoint (30 days)*	2
Last paid call*	2026-10-08
Tags	day of year, ordinal date lookup, date to day number, leap year day count, year day calculator, iso week number, week number lookup, iso 8601 week

* From the public x402 Bazaar index (snapshot 2026-10-18T04:07Z); reported by the facilitator, not measured by us.

Endpoints

URL	Method	Price
`https://datetime.openverbs.com/v1/day-of-year` Return the ordinal day of the year (1..366), the number of days in that year and whether it is a leap year.	POST	$0.004
`https://datetime.openverbs.com/v1/iso-week` Return the ISO-8601 week-numbering year, week number (1..53) and weekday (1=Monday..7=Sunday) for a Gregorian date.…	POST	$0.004
`https://datetime.openverbs.com/v1/easter` Compute the date of Western (Gregorian) Easter Sunday for a year in 1583..9999 using the Anonymous Gregorian computus.	POST	$0.004
`https://datetime.openverbs.com/v1/convert` Convert an ISO datetime into another timezone, with offset, weekday and Unix time.	POST	$0.002
`https://datetime.openverbs.com/v1/business-days` Add/subtract business days to a date, or count business days between two dates — skipping weekends and optional…	POST	$0.002
`https://datetime.openverbs.com/v1/between` Compute the calendar breakdown (years, months, days, hours, minutes, seconds) between two ISO 8601 dates/date-times,…	POST	$0.002
`https://datetime.openverbs.com/v1/parse` Parse an ISO 8601 duration such as 'P1Y2M10DT2H30M' into its components. Returns a normalized ISO string and…	POST	$0.002
`https://datetime.openverbs.com/v1/add` Add an ISO 8601 duration to a start date or date-time and return the resulting UTC instant. Calendar-aware: months and…	POST	$0.002
`https://datetime.openverbs.com/v1/humanize` Render an ISO 8601 duration as an English phrase, e.g. 'P1Y2M' → '1 year and 2 months'. Components are shown in…	POST	$0.002
`https://datetime.openverbs.com/v1/weekday` Return the ISO weekday (1=Monday..7=Sunday) and its name for a Gregorian date.	POST	$0.004
`https://datetime.openverbs.com/v1/format` Assemble an ISO 8601 duration string from individual components (years, months, weeks, days, hours, minutes, seconds)…	POST	$0.002
`https://datetime.openverbs.com/v1/from-jdn` Convert a Julian Day Number back to a proleptic-Gregorian date, with the ISO weekday (1=Monday..7=Sunday) and its name.	POST	$0.004
`https://datetime.openverbs.com/v1/to-jdn` Convert a proleptic-Gregorian calendar date to its Julian Day Number (the integer count of days since JDN 0, 1 January…	POST	$0.004

Source: x402 Bazaar discovery API (Coinbase CDP) · Licence: Public discovery metadata; descriptions by each provider. Listed in x402 pay-per-call APIs. We list tools; we do not test, rate or endorse them.

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