A method for designating dates in an interactive travel calendar including the steps of providing an interface for users to specify event ranges, each event range having a start date that chronologically precedes an end date, receiving a signal designating a first date associated with an event, receiving a signal designating a second date associated with an event, setting the first date or the second date as a start date for an event range based upon a chronological relationship between the first date and the second date, with the start date being the date earlier chronologically among the first and second date and the end date being the date chronologically later among the first and second date, and presenting information reflecting the event range.