← The evidence ledger
Evidence row 119455
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/calendar/easter
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 7b3526a82b3e091969729cebea77e2bbf7e6ad00976b4d260a1387e74896c6bc
- Leaf
- 0x34322bb8256c209811dfb14d6c2fdcccf97d81ac58cc4a2d24c46191519ef136
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/calendar/easter"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:easter-dates",
"name": "USD Coin",
"note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:easter-dates",
"name": "USD Coin",
"note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:137",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:easter-dates",
"name": "USD Coin",
"note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:42161",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"memo": "saylor:datadesk:easter-dates",
"reference": "3YE8317a8cSgKPmPCGf2dsXoiFdeA4u9sZAUu2QrwL86",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazplYXN0ZXItZGF0ZXMiLCJyZWZlcmVuY2UiOiIzWUU4MzE3YThjU2dLUG1QQ0dmMmRzWG9pRmRlQTR1OXNaQVV1MlFyd0w4NiIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNTQzNjk5NTc4fQ.P6vJdiPcd8BH4YAWpIE2_YpSCiPUxma22NxfmsaDl_U"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"memo": "saylor:datadesk:easter-dates",
"reference": "EPDj7U9QU5PkjciNUR9r7KUmhtBpgWebSeaKDGENoxkB",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazplYXN0ZXItZGF0ZXMiLCJyZWZlcmVuY2UiOiJFUERqN1U5UVU1UGtqY2lOVVI5cjdLVW1odEJwZ1dlYlNlYUtER0VOb3hrQiIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVzOXZNRnJ6YUNFUm1KZnJGNEgyRllENEtDb05rWTExTWNDZThCZW53TllCIiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNTQzNjk5NTc4fQ.63HJO6Cea2o4hQLRzEGbrw1EvrASFXpI8bD8JyxZZys"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "90908",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:easter-dates",
"native": true,
"note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
"quotedLamports": "93720",
"reference": "DoFmdUfEvEQB5oBQTNQ1FXdFpMmuDLBjbbcBiYmC7u3B",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazplYXN0ZXItZGF0ZXMiLCJyZWZlcmVuY2UiOiJEb0ZtZFVmRXZFUUI1b0JRVE5RMUZYZEZwTW11RExCamJiY0JpWW1DN3UzQiIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6bnVsbCwibWluQW1vdW50Ijo5MDkwOCwiZXhwIjoxNzkyNTQzNjk5NTc4fQ.eMEnEpQp7g9SH152E_gxZmuvR_jvCqZLzLoeso0c9f8",
"solUsdPrice": 106.7
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "Western and Orthodox Easter for any year from 1583 with Ash Wednesday, Palm Sunday, Good Friday, Ascension, Pentecost and Corpus Christi dates",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"year": "2027"
},
"type": "http"
},
"output": {
"example": {
"days_between": 35,
"note": "Western Easter uses the Gregorian computus (Meeus/Jones/Butcher); Orthodox Easter uses the Julian computus shown in the Gregorian calendar. Dates for Christmas-linked and fixed feasts are not included.",
"orthodox": {
"ascension_day": "2027-06-10",
"ash_wednesday": "2027-03-17",
"corpus_christi": "2027-07-01",
"easter_monday": "2027-05-03",
"easter_sunday": "2027-05-02",
"good_friday": "2027-04-30",
"holy_saturday": "2027-05-01",
"maundy_thursday": "2027-04-29",
"palm_sunday": "2027-04-25",
"pentecost": "2027-06-20",
"trinity_sunday": "2027-06-27",
"whit_monday": "2027-06-21"
},
"same_day": false,
"source": "computus algorithms",
"western": {
"ascension_day": "2027-05-06",
"ash_wednesday": "2027-02-10",
"corpus_christi": "2027-05-27",
"easter_monday": "2027-03-29",
"easter_sunday": "2027-03-28",
"good_friday": "2027-03-26",
"holy_saturday": "2027-03-27",
"maundy_thursday": "2027-03-25",
"palm_sunday": "2027-03-21",
"pentecost": "2027-05-16",
"shrove_tuesday": "2027-02-09",
"trinity_sunday": "2027-05-23",
"whit_monday": "2027-05-17"
},
"year": 2027
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"year": {
"description": "optional year 1583-2500, default this year",
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"days_between": {
"description": "Days between",
"type": "number"
},
"note": {
"description": "Caveat or context for reading the result",
"type": "string"
},
"orthodox": {
"description": "Orthodox Easter with its movable feasts",
"properties": {
"ascension_day": {
"description": "Ascension day",
"type": [
"string",
"null"
]
},
"ash_wednesday": {
"description": "Ash wednesday",
"type": [
"string",
"null"
]
},
"corpus_christi": {
"description": "Corpus christi",
"type": [
"string",
"null"
]
},
"easter_monday": {
"description": "Easter monday",
"type": [
"string",
"null"
]
},
"easter_sunday": {
"description": "Easter sunday",
"type": [
"string",
"null"
]
},
"good_friday": {
"description": "Good friday",
"type": [
"string",
"null"
]
},
"holy_saturday": {
"description": "Holy saturday",
"type": [
"string",
"null"
]
},
"maundy_thursday": {
"description": "Maundy thursday",
"type": [
"string",
"null"
]
},
"palm_sunday": {
"description": "Palm sunday",
"type": [
"string",
"null"
]
},
"pentecost": {
"description": "Pentecost date",
"type": [
"string",
"null"
]
},
"trinity_sunday": {
"description": "Trinity sunday",
"type": [
"string",
"null"
]
},
"whit_monday": {
"description": "Whit monday",
"type": [
"string",
"null"
]
}
},
"type": "object"
},
"same_day": {
"description": "Same day",
"type": "boolean"
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"western": {
"description": "Western Easter with Shrove Tuesday, Ash Wednesday, Palm Sunday, Good Friday, Ascension and Pentecost",
"properties": {
"ascension_day": {
"description": "Ascension day",
"type": [
"string",
"null"
]
},
"ash_wednesday": {
"description": "Ash wednesday",
"type": [
"string",
"null"
]
},
"corpus_christi": {
"description": "Corpus christi",
"type": [
"string",
"null"
]
},
"easter_monday": {
"description": "Easter monday",
"type": [
"string",
"null"
]
},
"easter_sunday": {
"description": "Easter sunday",
"type": [
"string",
"null"
]
},
"good_friday": {
"description": "Good friday",
"type": [
"string",
"null"
]
},
"holy_saturday": {
"description": "Holy saturday",
"type": [
"string",
"null"
]
},
"maundy_thursday": {
"description": "Maundy thursday",
"type": [
"string",
"null"
]
},
"palm_sunday": {
"description": "Palm sunday",
"type": [
"string",
"null"
]
},
"pentecost": {
"description": "Pentecost date",
"type": [
"string",
"null"
]
},
"shrove_tuesday": {
"description": "Shrove tuesday",
"type": [
"string",
"null"
]
},
"trinity_sunday": {
"description": "Trinity sunday",
"type": [
"string",
"null"
]
},
"whit_monday": {
"description": "Whit monday",
"type": [
"string",
"null"
]
}
},
"type": "object"
},
"year": {
"description": "Calendar year",
"type": "number"
}
},
"required": [
"year",
"western",
"orthodox"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-21T00:46:19.62Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-21T00:46:19.431Z"
},
"resource": "https://saylorinnovations.com/api/calendar/easter",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"when is easter in 2027",
"orthodox easter date",
"ash wednesday and good friday",
"pentecost date this year",
"easter sunday calculation"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Western and Orthodox Easter for any year from 1583 with Ash Wednesday, Palm Sunday, Good Friday, Ascension, Pentecost and Corpus Christi dates"
}What the leaf hashes
{"body":"7b3526a82b3e091969729cebea77e2bbf7e6ad00976b4d260a1387e74896c6bc","id":119455,"kind":"listing","method":"baseline/1","observed_us":1793025615630145,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/calendar/easter","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x34324ccf91f94d6817a0cdee40b727d46ce3033387d65d41e334811270c534b1
- 0x12aea4a9b1e1e5cc9fd12ece476d28bdd2c909e72587709e78b494070a0a062d
- 0xdfa982130b5447bf942ac00524c02216d2f7fe245a15b1c58c292dd651c38be6
- 0xa0d0a0e61db9df2fb06a550bd7b0d0b045e87dffb87ee775095e3abc4194a838
- 0x6cb6660758f28db1c60929aa5ee5091d4a3b95af3ebd457af9936ec980ec0efa
- 0xf2b3cfbeffbbe60911fda360617998feb3ba8695dbc5db79a296cb9214b61569
- 0xe982bda290b8630d841d866fabc3aa78dda75058e48063219b02dcab77868c9a
- 0x27fe9d06ba15e7c5fca43a1408f138640b9409c6fd4f6c12f9d9ef3d986b1005
- 0x82cf6b3d1aae668d4027a29813a07304e6d8998e5336cc71e349905c8a69da93
- 0x177012e4764007ed1fc9fe062981493cb1e87dce78b4d705154fc6b59f179dc8
- 0x25f1494b636c5e3c47bd014c16b8f4b5df5a8fb62efdc32979420416a8736679
- 0xe57be1a98d96d75db9e9d2122794eabebfd735dea66e9d16ca63347243b3d483
- 0x08de74b7fb265ddb83e4c673da8a94e5f71829b2e6e7464c71c5138e450f2217
- 0x4338355a835617a26aa0bfcc971e84eb030d84e2aa840e3c8af958921dd080c7
- 0x610738e0c43687aded83c613c73de8b5226c73c375858a167436461c522ea213
- 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae