Who is on the same rotation as me?

#!/usr/local/bin/python
import csv
import pprint

reader = list(csv.reader(open('/Users/username/Desktop/All.csv', 'rb')))

#outputall = []
outputall = {}

dates = [ '6/25/2013', '7/2/2013', '7/9/2013', '7/16/2013', '7/23/2013', '7/30/2013', '8/6/2013', '8/13/2013', '8/20/2013', '8/27/2013', '9/3/2013', '9/10/2013', '9/17/2013', '9/24/2013', '10/1/2013', '10/8/2013', '10/15/2013', '10/22/2013', '10/29/2013', '11/5/2013', '11/12/2013', '11/19/2013', '11/26/2013', '12/3/2013', '12/10/2013', '12/17/2013', '12/24/2013', '12/31/2013', '1/7/2014', '1/14/2014', '1/21/2014', '1/28/2014', '2/4/2014', '2/11/2014', '2/18/2014', '2/25/2014', '3/4/2014', '3/11/2014', '3/18/2014', '3/25/2014', '4/1/2014', '4/8/2014', '4/15/2014', '4/22/2014', '4/29/2014', '5/6/2014', '5/13/2014', '5/20/2014', '5/27/2014', '6/3/2014', '6/10/2014', '6/17/2014', '6/24/2014' ]

for date in dates:
    outputall.setdefault(date, [])

for row in reader:
    x = 0
    for column in row:
        if (column == reader[5][x] and row.index(column) > 3
        and row[0] != 'Lastname, Firstname'):
            key = str(reader[0][x])
            value = '{0}: {1}'.format(row[2], row[0])
            outputall[key].append(value)

#            output = '{0}\t{1}: {2}'.format(reader[0][x], row[2], row[0])
#            outputall.append(output)
        x += 1

for date, who in outputall.iteritems():
#    pprint.pprint(outputall)
    print '{0}:\t{1}'.format(date, '. '.join(who))

#outputall.sort()
#print '\r'.join(outputall)