/**
 * Return epoch timestamp
 * @param regime Set if you want milisecond format or second format
 * @returns
 */
export declare const nowTimestamp: (regime?: "milisecond" | "second") => number;
/**
 * Return now local timestamp plus number of seconds to add
 * @param secondsToAdd Seconds to add from now (1 = now + 1 sec.)
 * @returns Timestamp of the future (past) on seconds
 */
export declare const nowPlusTime: (secondsToAdd: number) => number;
/**
 * Convert epoch time value into ISO format
 * @param epochValue Epoch value of the timestamp
 * @returns ISO format of the date
 */
export declare const epochToIsoFormat: (epochValue: number) => string;
/**
 * Return epoch timestamp
 * @param regime Set if you want milisecond format or second format
 * @returns
 */
export declare const nowTimestampIso: () => string;
/**
 * Check if input date is valid for ISO format
 * @param dateToCheck
 * @returns
 */
export declare const hasIsoFormat: (dateToCheck: string) => boolean;
/**
 * Convert date in ISO formtat to milisecond timestamp
 * @param isoDate Date in ISO 8601 format
 * @returns Timestamp representing the date in miliseconds
 */
export declare const isoDateToTimestamp: (isoDate: string) => number;
/**
 * Format ISO 8601 interval to from-to values
 * @param interval Defined inteval in ISO format (from/to) of the UTC
 * @returns Tuple - from timestamp and to timestamp
 */
export declare const isoIntervalToTimestamps: (interval: string) => [number, number];