Syntax error converting datetime from character string using a sql query

Error:
Microsoft OLE DB Provider for SQL Server (0x80040E07)
Syntax error converting datetime from character string.

Data Structure:

1      event_id      int      4      0
0      grade      nvarchar      50      1
0      team      nvarchar      50      1
0      sport      nvarchar      50      1
0      gender      nvarchar      50      1
0      opponent      nvarchar      50      1
0      e_date      datetime      8      1
0      e_day      nvarchar      50      1
0      e_time      nvarchar      50      1
0      ap      nvarchar      50      1
0      location      nvarchar      50      1
0      home_visitor      nvarchar      50      1
0      message      nvarchar      50      1
0      status      nvarchar      50      1
0      post_season      bit      1      0
0      gate_keeper      nvarchar      50      1
0      clock      nvarchar      50      1
0      trainer      nvarchar      50      1
0      stadium_supervisor      nvarchar      50      1
0      facility_code      nvarchar      50      1




CREATE PROCEDURE [athsp_update_Events]
      (@grade       [nvarchar](50),
       @sport       [nvarchar](50),
       @gender       [nvarchar](50),
       @opponent       [nvarchar](50),
       @e_date       [nvarchar](50),
       @e_day       [nvarchar](50),
       @e_time       [nvarchar](50),
       @ap             [nvarchar](50),
       @location       [nvarchar](50),
       @home_visitor       [nvarchar](50),
       @message       [nvarchar](50),
       @post_season       [nvarchar](50),
       @event_id       [nvarchar](50),
       @table            [nvarchar](50))

AS
Declare @sql varchar(1000)

    Set @SQL = 'UPDATE [Athletics].[dbo].[' + @table + ']

SET         [grade]       = ''' + @grade + ''' ,
       [sport]       = ''' + @sport + ''' ,
       [gender]       = ''' + @gender + ''' ,
       [opponent]       = ''' + @opponent + ''' ,
       [e_date]       =  Convert (datetime, ''' + @e_date + ''') ,
       [e_day]       =   ''' + @e_day + ''' ,
       [e_time]       = ''' + @e_time + ''' ,
       [ap]       = ''' + @ap + ''' ,
       [location]       = ''' + @location + ''' ,
       [home_visitor]       = ''' + @home_visitor + ''' ,
       [message]       = ''' + @message + ''' ,
       [post_season]       = ''' + @post_season + '''  

WHERE
      ( [event_id]       = ''' + @event_id + ''')'



    EXEC (@SQL)
GO