WTF? 9.2.4 Logs have the wrong day of the week?

[root@<serverNameRemoved> pg_log]# ls -lrt

total 5924

-rw------- 1 postgres postgres  708669 Aug  8 18:59 postgresql-Thu.log

-rw------- 1 postgres postgres  669505 Aug  9 18:59 postgresql-Fri.log

-rw------- 1 postgres postgres  666603 Aug 10 18:56 postgresql-Sat.log

-rw------- 1 postgres postgres  559716 Aug 11 18:59 postgresql-Sun.log

-rw------- 1 postgres postgres  626143 Aug 12 18:56 postgresql-Mon.log

-rw------- 1 postgres postgres 2065282 Aug 13 18:24 postgresql-Tue.log

-rw------- 1 postgres postgres  755099 Aug 13 19:22 postgresql-Wed.log

[root@<serverNameRemoved> pg_log]# date

Tue Aug 13 19:23:53 CDT 2013