eachDay

Returns an array of Date objects for each day from start to end (inclusive).

Both boundaries are included. If start > end, an empty array is returned. Returns an empty array if either input is invalid.

Available since v2.0.0

Import

import { eachDay } from '@helpers4/date';
// or, from the all-in-one package (same code, one install):
import { eachDay } from 'helpers4/date';

eachDay(start: DateLike, end: DateLike): Date[]

Parameter	Type	Description
`start`	`DateLike`	Start date (inclusive)
`end`	`DateLike`	End date (inclusive)

Date[] — An array of Date objects, one per day

eachDay('2025-01-01', '2025-01-03')
// => [Date(2025-01-01), Date(2025-01-02), Date(2025-01-03)]

A value that can be converted to a Date.

Date — used as-is (validated for Invalid Date)
number — treated as a timestamp (seconds or milliseconds, auto-detected); 0 is treated as invalid and produces null in ensureDate
string — parsed via new Date(string)
Temporal.Instant | Temporal.ZonedDateTime — read via their epochMilliseconds property

type DateLike = Date | number | string | Temporal.Instant | Temporal.ZonedDateTime