... TWiki recognises the following formats for date/time strings. ... Some features of TWiki, such as searches, permit the specification of time intervals . A time interval is a period of time, such as "1337 to 1451" (the Hundred Years War) or "9th February 2005 to 26th March 2005" (the Christian season of Lent). ... For example, if the start of a date range is specified by just a year, e.g. 1999/2006 , it will be interpreted as starting at January 1st 1999, at zero hours zero minutes zero seconds. ...