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@burglekitt/gmt

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Temporal-based date and time utilities with timezone support and polyfill integration

github.com/burglekitt/gmt

burglekitt/gmt

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/** * Return the quarter of the year (1-4) for a given ISO date. * * - Returns the quarter (1-4) containing the input date. * - Q1 = months 1-3, Q2 = months 4-6, Q3 = months 7-9, Q4 = months 10-12. * - Validates input using isValidDate. * * @param value ISO PlainDate string * @returns number (1-4) or null for invalid input * * @example getQuarterForDate("2024-01-15") // 1 * @example getQuarterForDate("2024-04-15") // 2 * @example getQuarterForDate("2024-07-15") // 3 * @example getQuarterForDate("2024-10-15") // 4 * @example getQuarterForDate("invalid") // null */ export declare function getQuarterForDate(value: string): number | null;