import { Event } from '@hebcal/core/dist/esm/event';
/**
 * Bitmask of event flags that never have their own Torah reading (Daf Yomi,
 * Omer count, molad, Shabbat Mevarchim, etc.), used to skip such events when
 * finding a leyning key. {@link flags.MODERN_HOLIDAY} is included here, but a
 * few modern holidays do have readings — see {@link isModernHolidayWithReading}.
 * @readonly
 */
export declare const HOLIDAY_IGNORE_MASK: number;
/**
 * Most modern holidays have no Torah reading, but a few (such as
 * Yom HaAtzma'ut) do have an entry in `holiday-readings.json`
 * @param ev event
 * @returns true if this is a modern holiday that has a reading
 */
export declare function isModernHolidayWithReading(ev: Event): boolean;
/**
 * From an event's date, type and title, derives the key used to look up its
 * reading in `holiday-readings.json` (accounting for Shabbat, Rosh Chodesh,
 * Chol ha-Moed, and the Israel vs. Diaspora schedule).
 * @param ev the holiday event
 * @param [il] `true` for the Israel schedule (default `false`)
 * @returns the reading key for `holiday-readings.json`, or `undefined` if the
 *   event has no reading
 */
export declare function getLeyningKeyForEvent(ev: Event, il?: boolean): string | undefined;