Unknown column 'Date' in 'order clause'

(SELECT nEvoEventID as EventID, e.sName as Event, nDateTime, v.sName as Venue, sLocation, sSeatingChartSmall as MapLocation FROM tEvoEvents as e LEFT JOIN tEvoConfigurations as config ON e.nConfiguration = config.nEvoConfigurationID LEFT JOIN tEvoVenues as v ON e.nVenue = v.nEvoVenueID LEFT JOIN tEvoCategories as c ON e.nCategory = c.nEvoCategoryID WHERE nDateTime >= '1493556205' AND e.bStatus = 1 AND v.nEvoVenueID != '' AND c.nEvoCategoryID IN (1,2,3,4,5,6,121,7,8,9,10,11,12,13,14,122,129,15,16,17,18,126,127,136,137,19,20,124,21,22,23,81,123,24,133,134,135,131,132,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,88,130,141,44,45,46,47,48,49,50,51,52,53,78,79,80,125,128,139,176)) UNION (SELECT nEventID as EventID, events.sTitle as Event, nDateTime, venues.sTitle as Venue, CONCAT_WS(', ',sCity,sState) as sLocation, sVenueImage as MapLocation FROM tEvents as events LEFT JOIN tVenues as venues ON events.nVenueID = venues.nVenueID LEFT JOIN tEventCategories as categories ON events.nEventCategoryID = categories.nEventCategoryID WHERE nDateTime >= '1493556205' AND events.bStatus = 1 AND events.bDeleted = 0 AND categories.sCategory = "Sport") ORDER BY Date desc, Time desc LIMIT 0,20