import { StreakrDay } from '../types';
export declare const DAY_LABELS: string[];
export declare const MONTH_LABELS_SHORT: string[];
export declare const localDateKey: (d: Date) => string;
export declare const padDaysToYear: (days: StreakrDay[], year: number) => StreakrDay[];
export declare const padDaysToRange: (days: StreakrDay[], start: Date, end: Date) => StreakrDay[];
export declare const yearToDateRange: (today: Date) => {
    start: Date;
    end: Date;
};
export declare const gridFromDays: <T extends StreakrDay>(days: T[]) => (T | null)[][];
export declare const monthHeaders: (cols: (StreakrDay | null)[][]) => {
    col: number;
    label: string;
}[];
export declare const fmtDateLong: (date: Date) => string;
export declare const fmtDateShort: (date: Date) => string;
export declare const dayAngle: (dayIndex: number, totalDays: number) => number;
export declare const polarToCartesian: (cx: number, cy: number, r: number, angle: number) => {
    x: number;
    y: number;
};
export declare const dayToHandRotation: (day: Date, totalDays: number) => number;
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