/** Display dates as DD-MM-YYYY */
export declare function formatDate(value: Date | string | null | undefined): string;
/** HH:MM from decimal hours */
export declare function hoursToHhmm(hours: number | string | null | undefined): string;
/** Parse HH:MM into decimal hours */
export declare function parseHhmm(value: string): number;
export declare function toDateOnly(value: string | Date | null | undefined): Date | null;