import type { Branch, Stem } from "../types";
export declare const STEMS: readonly Stem[];
export declare const BRANCHES: readonly Branch[];
export declare const ELEMENTS: readonly ["wood", "fire", "earth", "metal", "water"];
export declare function getStemIndex(stem: Stem | string): number;
export declare function getBranchIndex(branch: Branch | string): number;
export declare function pillarFromIndex(idx60: number): string;
export declare function getPillarIndex(pillar: string): number;
export declare function jdnFromDate(year: number, month: number, day: number): number;
export declare function dayPillarIndexFromJdn(jdn: number): number;
export declare function isYangStem(stem: Stem | string): boolean;
export declare function isYinStem(stem: Stem | string): boolean;
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