Options¶ All options that take a “Date” can handle a Date object; a String formatted according to the given format; or a timedelta relative to today, eg “-1d”, “+6m +1y”, etc, where valid units are “d” (day), “w” (week), “m” (month), and “y” (year). Use “0” as today. There are also aliases for the relative timedelta’s: “yesterday” equals “-1d”, “today” is equal to “+0d” and “tomorrow” is equal to