type AnyDateTime = number | Date | string;
/**
 * Convert a number (epoch seconds or milliseconds), string (parseable
 * date/time or epoch seconds or milliseconds), or Date object (no conversion)
 * into a Date object.
 */
declare function toDate(ts: AnyDateTime): Date;
/**
 * Returns a date in yyyy-MM format. E.g. '2000-01'.
 *
 * @param dt Specify a date object or default to the current date.
 * @param separator Defaults to '-'.
 */
declare function yyyyMm(dt?: Date, separator?: string): string;
/**
 * Returns a date in yyyy-MM-dd format. E.g. '2000-01-02'.
 *
 * @param dt Specify a date object or default to the current date.
 * @param separator Defaults to '-'.
 */
declare function yyyyMmDd(dt?: Date, separator?: string): string;
/**
 * Returns a date in hh:mm format. E.g. '01:02'.
 *
 * @param dt Specify a date object or default to the current date/time.
 * @param separator Defaults to ':'.
 */
declare function hhMm(dt?: Date, separator?: string): string;
/**
 * Returns a date in hh:mm:ss format. E.g. '01:02:03'.
 *
 * @param dt Specify a date object or default to the current date/time.
 * @param separator Defaults to ':'.
 */
declare function hhMmSs(dt?: Date, separator?: string): string;
/**
 * Returns a date in hh:mm:ss.SSS format. E.g. '01:02:03.004'.
 *
 * @param dt Specify a date object or default to the current date/time.
 * @param timeSeparator Separator for hh/mm/ss. Defaults to ':'.
 * @param msSeparator Separator before SSS. Defaults to '.'.
 */
declare function hhMmSsMs(dt?: Date, timeSeparator?: string, msSeparator?: string): string;
/**
 * Returns the timezone string for the given date. E.g. '+8', '-3.5'.
 * Returns 'Z' for UTC.
 *
 * @param dt Specify a date object or default to the current date/time.
 */
declare function tzShort(dt?: Date): string;
/**
 * Returns the long month name, zero-indexed. E.g. 0 for 'January'.
 *
 * @param month Zero-indexed month.
 * @param locales Specify the locale, e.g. 'en-US', new Intl.Locale("en-US").
 */
declare function getLongMonthNameZeroIndexed(month: number, locales?: Intl.LocalesArgument): string;
/**
 * Returns the long month name, one-indexed. E.g. 1 for 'January'.
 *
 * @param month One-indexed month.
 * @param locales Specify the locale, e.g. 'en-US', new Intl.Locale("en-US").
 */
declare function getLongMonthNameOneIndexed(month: number, locales?: Intl.LocalesArgument): string;
/**
 * Returns the short month name, zero-indexed. E.g. 0 for 'Jan'.
 *
 * @param month Zero-indexed month.
 * @param locales Specify the locale, e.g. 'en-US', new Intl.Locale("en-US").
 */
declare function getShortMonthNameZeroIndexed(month: number, locales?: Intl.LocalesArgument): string;
/**
 * Returns the short month name, one-indexed. E.g. 1 for 'Jan'.
 *
 * @param month One-indexed month.
 * @param locales Specify the locale, e.g. 'en-US', new Intl.Locale("en-US").
 */
declare function getShortMonthNameOneIndexed(month: number, locales?: Intl.LocalesArgument): string;
/**
 * Returns a human-readable string date/time like '2025-01-01 22:31:16Z'.
 * Excludes the milliseconds assuming it is not necessary for display.
 */
declare function getDisplayDateTime(ts: AnyDateTime): string;

export { type AnyDateTime, getDisplayDateTime, getLongMonthNameOneIndexed, getLongMonthNameZeroIndexed, getShortMonthNameOneIndexed, getShortMonthNameZeroIndexed, hhMm, hhMmSs, hhMmSsMs, toDate, tzShort, yyyyMm, yyyyMmDd };