← The evidence ledger
Evidence row 2202147
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://calendar-systems.x402tookit.com/islamic-calendar
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- bd45826f70eb4002ccb1abd07b24a536e55f97290a52c09fce62ab751c2571b7
- Leaf
- 0x5f711a3ca9669b72b6dbeab351fa21477e70d73bff197969cde5aa8a0aa8f224
What was observed
{
"endpoints": [
[
"x402",
"https://calendar-systems.x402tookit.com/islamic-calendar"
]
],
"name": "Calendar Systems",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Convert a Gregorian date to the Islamic tabular civil calendar (or back); a calculated approximation, not moon sighting.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"date": "2024-03-11"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-11T08:54:33.116Z",
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"from": "gregorian",
"gregorian": {
"day": 11,
"iso": "2024-03-11",
"month": 3,
"weekday": "Monday",
"year": 2024
},
"islamic": {
"day": 1,
"input": "1445-09-01",
"leapYear": true,
"month": 9,
"monthLengthDays": 30,
"monthName": "Ramadan",
"observances": [
{
"gregorian": "2023-07-19",
"islamicDate": "1 Muharram",
"name": "Islamic New Year"
},
{
"gregorian": "2023-07-28",
"islamicDate": "10 Muharram",
"name": "Ashura"
}
],
"text": "1 Ramadan 1445 AH",
"year": 1445,
"yearLengthDays": 355
},
"notChecked": [
"observed moon sighting and Umm al-Qura (Saudi) month starts, which can differ by 1 to 2 days: confirm religious dates with your local authority",
"the astronomical-epoch (Thursday) variant of the tabular calendar, which is one day earlier",
"…1 more"
],
"reasons": [
"TABULAR approximation: months alternate 30 and 29 days with 11 leap years per 30-year cycle (years 2, 5, 7, 10, 13, 16, 18, 21, 24, 26, 29), civil (Friday) epoch of 16 July 622 Julian.",
"The real calendar starts each month with a moon sighting or the Umm al-Qura table, so observed dates can differ from this one by a day or two."
],
"source": "Reingold and Dershowitz, Calendrical Calculations: tabular Islamic calendar (civil epoch, 30-year cycle), computed locally",
"summary": "2024-03-11 (Monday) is 1 Ramadan 1445 AH in the Islamic (tabular civil) calendar.",
"supported": true,
"verdict": "CONVERTED",
"weekday": "Monday"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"date": {
"description": "YYYY-MM-DD, in the Gregorian calendar (default) or in the islamic calendar when from=islamic",
"type": "string"
},
"from": {
"description": "gregorian (default) or islamic: which calendar the date is written in",
"enum": [
"gregorian",
"islamic"
],
"type": "string"
}
},
"required": [
"date"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"from": {
"type": [
"null",
"string"
]
},
"gregorian": {
"properties": {
"day": {
"type": [
"null",
"number"
]
},
"iso": {
"type": [
"null",
"string"
]
},
"month": {
"type": [
"null",
"number"
]
},
"weekday": {
"type": [
"null",
"string"
]
},
"year": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"islamic": {
"properties": {
"day": {
"type": [
"null",
"number"
]
},
"input": {
"type": [
"null",
"string"
]
},
"leapYear": {
"type": [
"boolean",
"null"
]
},
"month": {
"type": [
"null",
"number"
]
},
"monthLengthDays": {
"type": [
"null",
"number"
]
},
"monthName": {
"type": [
"null",
"string"
]
},
"observances": {
"items": {
"properties": {
"gregorian": {
"type": [
"null",
"string"
]
},
"islamicDate": {
"type": [
"null",
"string"
]
},
"name": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"text": {
"type": [
"null",
"string"
]
},
"year": {
"type": [
"null",
"number"
]
},
"yearLengthDays": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"supported": {
"type": [
"boolean",
"null"
]
},
"verdict": {
"type": [
"null",
"string"
]
},
"weekday": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:40:19.27Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:40:19.101Z"
},
"resource": "https://calendar-systems.x402tookit.com/islamic-calendar",
"serviceName": "Calendar Systems",
"tags": [
"islamic-calendar",
"hijri",
"calendar",
"dates"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Convert a Gregorian date to the Islamic tabular civil calendar (or back); a calculated approximation, not moon sighting."
}What the leaf hashes
{"body":"bd45826f70eb4002ccb1abd07b24a536e55f97290a52c09fce62ab751c2571b7","id":2202147,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646813492430,"prev":null,"subject":"x402_bazaar:https://calendar-systems.x402tookit.com/islamic-calendar","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- 0xd86f08ca15efa6aec068ad966862d3df27372d00003f42f3feb9c02a903a2b43
- 0xe30e7b3032f9bb3eb72a005fa4a5fbed02174cf23661a5f3f8bb32b7a445b6fe
- 0xe64a747a4588deb641650a905bd4bb1d01d265c1870b16b983036a6cc65b4dee
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- 0x5b4d285b47d955b31f2cd89eac56d478f74fdf517a63412ee7de7e1fbbc40607
- 0x52f2f5577c556f825a80c2f8ecb90d03b52b0d2a34fbe7caa8b2d39106e9db10
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- 0x23f4763e8db2efe57fbc28dfc68f2b97b65f54a03425994e68157763af649a50
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- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af