isValidDateTimeInterval

Signature

isValidDateTimeInterval(start: string, end: string): boolean

import { isValidDateTimeInterval } from "@northguild/gmt/plain/interval";

Return true if start and end form a valid datetime interval — both parseable as

• ISO PlainDateTime strings and start <= end.
• Both inputs must be ISO 8601 datetime strings (e.g. "2024-01-01T10:00:00").
• Equal start === end is valid.
• Invalid input, malformed strings, or leap-second strings return false.

Parameters

Parameter	Type	Description
start	string	ISO 8601 datetime string (interval start)
end	string	ISO 8601 datetime string (interval end)

Returns

true if start and end form a valid datetime interval, or false on invalid input

Examples

isValidDateTimeInterval("2024-01-01T10:00:00", "2024-12-31T23:59:59") // true
isValidDateTimeInterval("2024-01-01T10:00:00", "2024-01-01T10:00:00") // true
isValidDateTimeInterval("2024-12-31T23:59:59", "2024-01-01T10:00:00") // false
isValidDateTimeInterval("invalid", "2024-12-31T23:59:59") // false

Source

plain/interval/validate/isValidDateTimeInterval.ts