/**
 * Defines the Grail min date.
 * @internal
 */
export declare const GRAIL_MIN_DATE = "1677-09-21T00:12:43.145224192Z";
/**
 * Defines the Grail max date.
 * @internal
 */
export declare const GRAIL_MAX_DATE = "2262-04-11T23:47:16.854775807Z";
/**
 * Get the formatted localized date/time.
 * @public
 */
export declare function getFormattedDateTime(date: Date): string;
/**
 * Get milli-/micro-/nanoseconds string from string.
 * @internal
 */
export declare function getSecondFractions(searchString: string | null): string;
/**
 * Replace the milli/micro/nano seconds part.
 * @returns Simplified extended ISO string
 * @internal
 */
export declare function replaceSecondFractions(
/** Date-time-string in simplified extended ISO format (Zulu time) */
searchString: string, 
/** Fractions of a second, without ending 'Z' */
milliMicroNanoSeconds?: string | null): string;
/**
 * Replace time of given ISO date string with given time.
 * @internal
 */
export declare function applyInitialTime(newDate: string, originalDate: string | null, milliMicroNanoSeconds?: string): string;