NYSE, Federal Reserve, TARGET2 and UK business days, holidays and T+N settlement dates.
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Adds (or with negative days subtracts) N business days to a date on a joint calendar (NYSE, Fedwire/FedACH, TARGET2, UK) and lists the holidays skipped. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.
Start date YYYY-MM-DD
Business days to add, -2000..2000
Comma list of calendars; a day is a business day only if open in all. XNYS (NYSE), FED (Fedwire/FedACH), TARGET2 (EUR), UK-ENG. Aliases: NYSE, US, ACH, EUR, UK. Default FED.
Adds (or with negative days subtracts) N business days to a date on a joint calendar (NYSE, Fedwire/FedACH, TARGET2, UK) and lists the holidays skipped. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.
| Argument | Type | Description |
|---|---|---|
| date* | string | Start date YYYY-MM-DD |
| days* | string | Business days to add, -2000..2000 |
| calendars | string | Comma list of calendars; a day is a business day only if open in all. XNYS (NYSE), FED (Fedwire/FedACH), TARGET2 (EUR), UK-ENG. Aliases: NYSE, US, ACH, EUR, UK. Default FED. |
{
"type": "object",
"required": [
"date",
"days"
],
"properties": {
"date": {
"type": "string",
"examples": [
"2026-12-23"
],
"description": "Start date YYYY-MM-DD"
},
"days": {
"type": "string",
"examples": [
"2"
],
"description": "Business days to add, -2000..2000"
},
"calendars": {
"type": "string",
"examples": [
"XNYS,FED"
],
"description": "Comma list of calendars; a day is a business day only if open in all. XNYS (NYSE), FED (Fedwire/FedACH), TARGET2 (EUR), UK-ENG. Aliases: NYSE, US, ACH, EUR, UK. Default FED."
}
}
}Rolls a date that falls on a weekend or holiday using a business-day convention: following, modified_following, preceding, modified_preceding. Typical for payment, coupon and invoice due dates. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.
| Argument | Type | Description |
|---|---|---|
| date* | string | Date YYYY-MM-DD |
| calendars | string | Comma list of calendars; a day is a business day only if open in all. XNYS (NYSE), FED (Fedwire/FedACH), TARGET2 (EUR), UK-ENG. Aliases: NYSE, US, ACH, EUR, UK. Default FED. |
| convention | string | following | modified_following | preceding | modified_preceding. Default modified_following |
{
"type": "object",
"required": [
"date"
],
"properties": {
"date": {
"type": "string",
"examples": [
"2027-12-25"
],
"description": "Date YYYY-MM-DD"
},
"calendars": {
"type": "string",
"examples": [
"TARGET2"
],
"description": "Comma list of calendars; a day is a business day only if open in all. XNYS (NYSE), FED (Fedwire/FedACH), TARGET2 (EUR), UK-ENG. Aliases: NYSE, US, ACH, EUR, UK. Default FED."
},
"convention": {
"type": "string",
"examples": [
"modified_following"
],
"description": "following | modified_following | preceding | modified_preceding. Default modified_following"
}
}
}Counts business days between two dates on a joint calendar: days after start up to and including end (inclusive=true also counts start). Negative if end is before start. Lists weekday holidays in range. Max 10 years. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.
| Argument | Type | Description |
|---|---|---|
| end* | string | End date YYYY-MM-DD |
| start* | string | Start date YYYY-MM-DD |
| calendars | string | Comma list of calendars; a day is a business day only if open in all. XNYS (NYSE), FED (Fedwire/FedACH), TARGET2 (EUR), UK-ENG. Aliases: NYSE, US, ACH, EUR, UK. Default FED. |
| inclusive | string | true to count the start date too |
{
"type": "object",
"required": [
"start",
"end"
],
"properties": {
"end": {
"type": "string",
"examples": [
"2026-12-31"
],
"description": "End date YYYY-MM-DD"
},
"start": {
"type": "string",
"examples": [
"2026-01-01"
],
"description": "Start date YYYY-MM-DD"
},
"calendars": {
"type": "string",
"examples": [
"XNYS,FED"
],
"description": "Comma list of calendars; a day is a business day only if open in all. XNYS (NYSE), FED (Fedwire/FedACH), TARGET2 (EUR), UK-ENG. Aliases: NYSE, US, ACH, EUR, UK. Default FED."
},
"inclusive": {
"type": "string",
"examples": [
"false"
],
"description": "true to count the start date too"
}
}
}Whether a date is a business day on one or more settlement calendars (NYSE, Fedwire/FedACH, TARGET2, UK), which holiday closes it, NYSE early closes, and the previous/next business day. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.
| Argument | Type | Description |
|---|---|---|
| date* | string | Date YYYY-MM-DD |
| calendars | string | Comma list of calendars; a day is a business day only if open in all. XNYS (NYSE), FED (Fedwire/FedACH), TARGET2 (EUR), UK-ENG. Aliases: NYSE, US, ACH, EUR, UK. Default FED. |
{
"type": "object",
"required": [
"date"
],
"properties": {
"date": {
"type": "string",
"examples": [
"2026-11-27"
],
"description": "Date YYYY-MM-DD"
},
"calendars": {
"type": "string",
"examples": [
"XNYS,FED"
],
"description": "Comma list of calendars; a day is a business day only if open in all. XNYS (NYSE), FED (Fedwire/FedACH), TARGET2 (EUR), UK-ENG. Aliases: NYSE, US, ACH, EUR, UK. Default FED."
}
}
}Lists closing days for one calendar and year (2000-2099): NYSE full closures and 1 pm early closes, Federal Reserve (Fedwire/FedACH) holidays with Saturday/Sunday observance rules, TARGET2 closing days, UK England & Wales bank holidays with substitute days. Weekend-only holidays with no weekday closure are omitted. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.
| Argument | Type | Description |
|---|---|---|
| year* | string | Year 2000-2099 |
| calendar* | string | XNYS, FED, TARGET2 or UK-ENG |
{
"type": "object",
"required": [
"calendar",
"year"
],
"properties": {
"year": {
"type": "string",
"examples": [
"2027"
],
"description": "Year 2000-2099"
},
"calendar": {
"type": "string",
"examples": [
"XNYS"
],
"description": "XNYS, FED, TARGET2 or UK-ENG"
}
}
}Settlement date T+N for a trade date on a joint calendar. Default XNYS,FED with t=1 (US equities since 28 May 2024). If the trade date is not a business day it is first rolled to the next one. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.
| Argument | Type | Description |
|---|---|---|
| t | string | Settlement lag in business days (0-10). Default 1 |
| calendars | string | Calendars; default XNYS,FED |
| trade_date* | string | Trade date YYYY-MM-DD |
{
"type": "object",
"required": [
"trade_date"
],
"properties": {
"t": {
"type": "string",
"examples": [
"1"
],
"description": "Settlement lag in business days (0-10). Default 1"
},
"calendars": {
"type": "string",
"examples": [
"XNYS,FED"
],
"description": "Calendars; default XNYS,FED"
},
"trade_date": {
"type": "string",
"examples": [
"2026-12-24"
],
"description": "Trade date YYYY-MM-DD"
}
}
}