@livefolio/sdk / NYSEExchangeCalendar

Class: NYSEExchangeCalendar

Defined in: calendars/nyse.ts:973

New York Stock Exchange (NYSE) trading-day calendar covering 1885-01-01 to the present. Also applicable to NYSE-equivalent venues (NASDAQ, BATS, DJIA, DOW). Faithful port of pandas_market_calendars' nyse.py.

Era boundaries:

• Weekmask: Mon–Sat through 1952-09-28; Mon–Fri from 1952-09-29 onward (Saturday trading retired on that date).
• Regular open: 10:00 ET before 1985-09-30; 09:30 ET from 1985-09-30 onward.
• Regular close: 15:00 ET before 1952-09-29; 15:30 ET through 1973-12-31; 16:00 ET from 1974-01-02 onward. Saturday closes (pre-1952) are approximated as 12:00.

Holiday coverage includes the full set of regular (rule-derived) and adhoc (literal date set) closures sourced from pandas_market_calendars, spanning historical events from the Ulysses Grant funeral (1885) through the Jimmy Carter national day of mourning (2025).

Extends

• ExchangeCalendar

Constructors

Constructor

new NYSEExchangeCalendar(): NYSEExchangeCalendar

Returns

NYSEExchangeCalendar

Inherited from

ExchangeCalendar.constructor

Properties

Property	Modifier	Type	Default value	Description	Overrides	Defined in
name	readonly	"NYSE"	'NYSE'	Short exchange name used as the registry key in getCalendar.	ExchangeCalendar.name	calendars/nyse.ts:974
tz	readonly	"America/New_York"	'America/New_York'	IANA timezone identifier, e.g. 'America/New_York' or 'Europe/London'.	ExchangeCalendar.tz	calendars/nyse.ts:975

Methods

isEarlyClose()

isEarlyClose(t): boolean

Defined in: calendars/exchange-calendar.ts:262

Returns true if the exchange closes early on the day containing t. Common examples: Black Friday (US), Christmas Eve, New Year's Eve.

Parameters

Parameter	Type	Description
t	Date	The instant or day to test.

Returns

boolean

Inherited from

ExchangeCalendar.isEarlyClose

---

isOpen()

isOpen(t): boolean

Defined in: calendars/exchange-calendar.ts:215

Returns true when t falls on a regular trading day (weekmask check, then holiday check).

Parameters

Parameter	Type
t	Date

Returns

boolean

Inherited from

ExchangeCalendar.isOpen

---

next()

next(t): Date

Defined in: calendars/exchange-calendar.ts:225

Returns the first trading day strictly after t.

Parameters

Parameter	Type
t	Date

Returns

Date

Inherited from

ExchangeCalendar.next

---

previous()

previous(t): Date

Defined in: calendars/exchange-calendar.ts:232

Returns the first trading day strictly before t.

Parameters

Parameter	Type
t	Date

Returns

Date

Inherited from

ExchangeCalendar.previous

---

schedule()

schedule(range): readonly Session[]

Defined in: calendars/exchange-calendar.ts:253

Returns full Session records (date, open instant, close instant) for every trading day in the half-open interval [range.from, range.to).

Parameters

Parameter	Type	Description
range	DateRange	Half-open date range.

Returns

readonly Session[]

Ascending array of Session objects. Early-close days have a close earlier than the normal session close.

Inherited from

ExchangeCalendar.schedule

---

sessions()

sessions(range): readonly Date[]

Defined in: calendars/exchange-calendar.ts:242

Returns UTC midnight Date objects for every trading day in [range.from, range.to). The from bound is inclusive; to is exclusive.

Parameters

Parameter	Type
range	DateRange

Returns

readonly Date[]

Inherited from

ExchangeCalendar.sessions