/**
 * Contains solar solstice dates within a specified time range.
 */
export type SolsticeData = {
    /** Summer solstice dates (northern hemisphere) in UTC */
    summer: Date[];
    /** Winter solstice dates (northern hemisphere) in UTC */
    winter: Date[];
};
/**
 * Finds all solstice events (summer and winter) that occur within the given datetime range.
 * The algorithm uses a per-year approximate guess, then refines via Newton’s method applied
 * to the derivative of the sun's declination.
 *
 * The function returns an object containing arrays of Date objects for summer and winter solstices.
 *
 * @param rangeStart - Starting Date of the range.
 * @param rangeEnd - Ending Date of the range.
 * @returns Object with keys 'summer' and 'winter', each an array of Date instances.
 */
export declare function getSolstices(rangeStart: Date, rangeEnd: Date): SolsticeData;
//# sourceMappingURL=solstice.d.ts.map