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Easter Date Calculator (Gregorian)
x402
Easter Date Calculator (Gregorian) is a paid API for AI agents from datetime.openverbs.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).
Computes the exact date of Western (Gregorian) Easter Sunday for any year between 1583 and 9999 using the Anonymous Gregorian computus algorithm.
Price / call$0.004
Success—
StatusUnknown
How this service works
Compute the date of Western (Gregorian) Easter Sunday for a year in 1583..9999 using the Anonymous Gregorian computus.
Output
Returns the exact calendar date of Gregorian Easter Sunday for the requested year, including the month and day, computed via the Anonymous Gregorian computus algorithm.
Example use cases
Holiday scheduling for retail planner
“When is Easter Sunday in 2027? I need the exact date so I can plan our spring sale calendar around it.”
Liturgical calendar generation
“Calculate the date of Easter for every year from 2025 to 2035 so I can build out our church's liturgical calendar.”
Historical Easter date research
“What was the date of Easter Sunday in the year 1700? I'm doing historical research on 18th-century religious observances.”
Technical details
Endpoint
POSThttps://datetime.openverbs.com/v1/easterWhen to prefer
Use this endpoint when you need a precise, algorithmically correct Gregorian Easter date for any year in the range 1583–9999. It is preferable to a general-purpose LLM answer (which may hallucinate Easter dates) or a manual lookup table. It is specifically for Western/Gregorian Easter, not Orthodox Easter (Julian calendar), so choose accordingly.
Side effects
- Year below 1583 or above 9999 returns a validation error — the algorithm only covers the Gregorian calendar period
- Missing or non-integer year field causes a 400 bad request
- Network timeout or service unavailability returns a 5xx error
- Payment failure (x402) blocks the request if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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