parseDayOfWeekFromDate

Signature

parseDayOfWeekFromDate(value: string): number

import { parseDayOfWeekFromDate } from "@northguild/gmt/plain/parse";

Return the day of week (1-7) for a given ISO 8601 date string.

• Monday=1 through Sunday=7.
• Returns null for invalid input.

Parameters

Parameter	Type	Description
value	string	ISO date string

Returns

Day of week (1-7) or null on invalid input

Examples

parseDayOfWeekFromDate("2024-01-01") // 1 (Monday)
parseDayOfWeekFromDate("2024-01-07") // 7 (Sunday)
parseDayOfWeekFromDate("2024-01-08") // 1 (Monday)
parseDayOfWeekFromDate("invalid") // null

Source

plain/parse/parseDayOfWeekFromDate.ts