//#region src/calendar-system/hebrew.d.ts
/**
 * Pure math functions for Gregorian <-> Hebrew calendar conversion.
 *
 * Based on the Reingold/Dershowitz algorithm from "Calendrical Calculations".
 * Uses the fixed arithmetic Hebrew calendar with postponement rules (dehiyot).
 *
 * Hebrew epoch: Monday, October 7, 3761 BCE (proleptic Gregorian) = 1 Tishrei, Year 1.
 *
 * Months (1-indexed):
 *  1 Tishrei (30), 2 Cheshvan (29-30), 3 Kislev (29-30), 4 Tevet (29),
 *  5 Shevat (30), 6 Adar/Adar I (30 in leap), 7 Adar II (29, leap only),
 *  8 Nisan (30), 9 Iyar (29), 10 Sivan (30), 11 Tammuz (29),
 *  12 Av (30), 13 Elul (29)
 *
 * In a common year: 12 months (no Adar II; month 6 = Adar, 29 days).
 * In a leap year: 13 months (month 6 = Adar I 30 days, month 7 = Adar II 29 days).
 *
 * @module
 */
/**
 * Hebrew month names (1-indexed by position).
 */
declare const HEBREW_MONTHS: string[];
/**
 * Check if a Hebrew year is a leap year (has 13 months).
 */
declare function isLeapHebrewYear(hy: number): boolean;
/**
 * Number of months in a Hebrew year.
 */
declare function hebrewMonthsInYear(hy: number): number;
/**
 * Get the total number of days in a Hebrew year.
 */
declare function hebrewYearLength(hy: number): number;
/**
 * Get the number of days in a Hebrew month.
 *
 * @param hy - Hebrew year
 * @param hm - Hebrew month (1-indexed, 1 = Tishrei, 13 = Elul)
 */
declare function hebrewMonthLength(hy: number, hm: number): number;
/**
 * Convert a Gregorian date to a Hebrew date.
 *
 * @param gy - Gregorian year
 * @param gm - Gregorian month (1-indexed, 1 = January)
 * @param gd - Gregorian day
 * @returns Hebrew year, month (1-indexed), and day
 */
declare function toHebrew(gy: number, gm: number, gd: number): {
  hy: number;
  hm: number;
  hd: number;
};
/**
 * Convert a Hebrew date to a Gregorian date.
 *
 * @param hy - Hebrew year
 * @param hm - Hebrew month (1-indexed, 1 = Tishrei)
 * @param hd - Hebrew day
 * @returns Gregorian year, month (1-indexed), and day
 */
declare function hebrewToGregorian(hy: number, hm: number, hd: number): {
  gy: number;
  gm: number;
  gd: number;
};
//#endregion
export { HEBREW_MONTHS, hebrewMonthLength, hebrewMonthsInYear, hebrewToGregorian, hebrewYearLength, isLeapHebrewYear, toHebrew };