Oh my goodness...it's putting January 2015 logs into January 2014! Any clues on how to fix that? It's RHEL 6, elastic search 1.1.2 out of their repo.
$ ls -lrt /var/lib/elasticsearch/elasticsearch/nodes/0/indices/ total 140
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 4 14:09 logstash-2014.12.04
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 5 07:16 logstash-2014.12.05
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 5 19:00 logstash-2014.12.06
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 6 19:00 logstash-2014.12.07
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 7 04:23 logstash-2014.11.30
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 7 04:26 logstash-2014.12.01
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 7 04:31 logstash-2014.12.02
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 7 04:35 logstash-2014.12.03
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 7 19:00 logstash-2014.12.08
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 8 19:00 logstash-2014.12.09
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 9 19:00 logstash-2014.12.10
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 10 19:00 logstash-2014.12.11
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 11 19:00 logstash-2014.12.12
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 12 19:00 logstash-2014.12.13
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 13 19:00 logstash-2014.12.14
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 14 19:00 logstash-2014.12.15
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 15 19:00 logstash-2014.12.16
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 16 19:00 logstash-2014.12.17
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 17 19:00 logstash-2014.12.18
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 18 19:00 logstash-2014.12.19
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 19 19:00 logstash-2014.12.20
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 20 19:00 logstash-2014.12.21
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 21 19:00 logstash-2014.12.22
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 22 19:00 logstash-2014.12.23
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 23 19:00 logstash-2014.12.24
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 24 19:00 logstash-2014.12.25
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 25 19:00 logstash- 2014.12.26
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 26 19:00 logstash-2014.12.27
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 27 19:00 logstash-2014.12.28
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 28 19:00 logstash-2014.12.29
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 29 19:00 logstash-2014.12.30
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 30 19:00 logstash-2014.12.31
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Dec 31 19:00 logstash-2015.01.01
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Jan 1 00:00 logstash-2014.01.01
drwxr-xr-x. 8 elasticsearch elasticsearch 4096 Jan 1 19:00 logstash-2014.01.02