sub-accounting-calendar-utility

A library of calendar functions that are aware of 3 separately defined processing calendars :

• Trading Calendar - defines which days the NYSE is open for trading. Governs trade-date (and asof) date calculations.

• Processing Calendar - defines which days the platform processes transactions; typically follows the Trading Calendar (but is defined separately to allow processing even on days the NYSE is not open for trading).

• Banking Calendar - defines which days the US Fed Banking system is open. Governs settlement-date and banking availability date calculations.

In addition to these 3 calendars, there are also 3 parallel "early close" calendars which contain the dates that the respective markets and business close early. This is used to govern time-sensitive activity cutoffs on the few days a year that each close early.

Background

The library is built around the date-fns javascript library which extends the normal Javascript date utilities.

Our library, in turn, adds convenience routines for 'date-math' which acknowledge these 3 calendars - adding business domain functionality around these calendars.

Our standard interchange format for dates is a String of the ISO8601 standard date format (yyyy-mm-dd). The library provides some additional convenience functions to make working with that format, and the more traditional fintech format of yyyymmdd more succinct.

This library currently does not address "time".

Functions

Utility Functions

function	description
toIsoDate(inDate: String or Number or Date): String)	flexible routine to parse a date and return our standard yyyy-mm-dd string
isValidIsoDate(inDate: String): boolean)	returns true/false if inDate is valid; inDate is yyyy-mm-dd standard format
validateDateParam(inDate: String): boolean)	returns true if valid inDate; throws "Invalid Date Param" error otherwise