DATA.readlines.each{ |line|
  times = line.chomp.split(",")
  unless times.empty?
    #do stuff here
    p times
  end
}
#=> ["Monday", "07:46", "12:04", "12:45", "17:09"]
#=> ["Tuesday", "08:00", "12:28", "13:21", "18:09"]
#=> ["Wednesday", "07:49", "12:05", "12:58", "18:01"]


__END__
Monday,07:46,12:04,12:45,17:09
Tuesday,08:00,12:28,13:21,18:09
Wednesday,07:49,12:05,12:58,18:01