declare const timeOptions: {
    readonly hour24: {
        readonly default: RegExp;
        readonly withSeconds: RegExp;
        readonly withOptionalSeconds: RegExp;
    };
    readonly hour12: {
        readonly default: RegExp;
        readonly withSeconds: RegExp;
        readonly withOptionalSeconds: RegExp;
    };
};
export interface IsTimeOptions {
    format?: keyof typeof timeOptions;
    mode?: 'withSeconds' | 'default' | 'withOptionalSeconds';
}
export default function isTime(input: string, options: IsTimeOptions): boolean;
export {};