export type DateFormatOptions = {
    format?: 'full' | 'long' | 'medium' | 'short';
    relative?: boolean;
    includeTime?: boolean;
    locale?: string;
};
export declare function formatRelativeDate(dateString: string): string;
export declare function formatDate(date: string | Date, options?: DateFormatOptions): string;
export declare function minimalFormatDate(date: Date): string;
export declare function narrowTimeDelta(isoTimestamp: string): string | undefined;
export declare const isoDateRegex: RegExp;
export declare function timeAgo(date: string | Date): string;