diff --git a/src/ucore_logging.c b/src/ucore_logging.c
index d038bff..79ea462 100644
--- a/src/ucore_logging.c
+++ b/src/ucore_logging.c
@@ -306,11 +306,17 @@ static inline void uc_vlog_internal(const struct uc_log_args *args, const char *
     if(dest->dest_type != UC_LDEST_SYSLOG && dest->type.file.file != NULL) {
         char time_buf[48];
         time_t now;
-        struct tm tmbuf;
+        struct tm t;
 
         now = time(NULL);
-        localtime_r(&now, &tmbuf);
-        strftime(time_buf, sizeof time_buf, "%d %b %Y %H:%M:%S %Z", &tmbuf);
+        localtime_r(&now, &t);
+        snprintf(time_buf, sizeof time_buf, "%04d-%02d-%02d %02d:%02d:%02d",
+                                            t.tm_year + 1900,
+                                            t.tm_mon + 1,
+                                            t.tm_mday,
+                                            t.tm_hour,
+                                            t.tm_min,
+                                            t.tm_sec);
 
         if(dest->log_location) {
             fprintf(dest->type.file.file, "[%s] %s %s:%d [%s] : ", uc_ll_2_str(args->log_level), 
diff --git a/test/test_logging.c b/test/test_logging.c
index c5ef3ea..c95b052 100644
--- a/test/test_logging.c
+++ b/test/test_logging.c
@@ -56,7 +56,7 @@ START_TEST (test_logfile_location)
 
     rc = stat(FILE_NAME, &st);
     fail_if(rc != 0, "stat failed: %s\n", strerror(errno));
-    fail_if(st.st_size != 79*2, "was %ld\n", (long)st.st_size);//should be 82 chars per log statement
+    fail_if(st.st_size != 74*2, "was %ld\n", (long)st.st_size);
 END_TEST
 
 START_TEST (test_logfile_no_location)
@@ -86,7 +86,7 @@ START_TEST (test_logfile_no_location)
 
     rc = stat(FILE_NAME, &st);
     fail_if(rc != 0, "stat failed: %s\n", strerror(errno));
-    fail_if(st.st_size != 55*2, "was %ld\n", (long)st.st_size);//should be 82 chars per log statement
+    fail_if(st.st_size != 50*2, "was %ld\n", (long)st.st_size);
 END_TEST
 
 START_TEST (test_logfile_loglevel_surpressed_dest)
@@ -118,7 +118,7 @@ START_TEST (test_logfile_loglevel_surpressed_dest)
     rc = stat(FILE_NAME, &st);
     fail_if(rc != 0, "stat failed: %s\n", strerror(errno));
 
-    fail_if(st.st_size != 0, "was %ld\n", (long)st.st_size);//should be 82 chars per log statement
+    fail_if(st.st_size != 0, "was %ld\n", (long)st.st_size);
 END_TEST
 
 START_TEST (test_logfile_loglevel_surpressed_module)
@@ -150,7 +150,7 @@ START_TEST (test_logfile_loglevel_surpressed_module)
     rc = stat(FILE_NAME, &st);
     fail_if(rc != 0, "stat failed: %s\n", strerror(errno));
 
-    fail_if(st.st_size != 0, "was %ld\n", (long)st.st_size);//should be 82 chars per log statement
+    fail_if(st.st_size != 0, "was %ld\n", (long)st.st_size);
 END_TEST
 
 START_TEST (test_logfile_reopen_files)
@@ -180,7 +180,7 @@ START_TEST (test_logfile_reopen_files)
 
     rc = stat(FILE_NAME, &st);
     fail_if(rc != 0, "stat failed: %s\n", strerror(errno));
-    fail_if(st.st_size != 80*2, "was %ld\n", (long)st.st_size);//should be 82 chars per log statement
+    fail_if(st.st_size != 75*2, "was %ld\n", (long)st.st_size);
 
     rc = remove(FILE_NAME);
     fail_if(rc != 0, "Remove failed %s\n", strerror(errno));
@@ -192,7 +192,7 @@ START_TEST (test_logfile_reopen_files)
 
     rc = stat(FILE_NAME, &st);
     fail_if(rc != 0, "2. stat failed: %s\n", strerror(errno));
-    fail_if(st.st_size != 80, "was %ld\n", (long)st.st_size);//should only one line there now
+    fail_if(st.st_size != 75, "was %ld\n", (long)st.st_size);//should only one line there now
 
 END_TEST
 
@@ -229,7 +229,7 @@ START_TEST (test_logfile_remove_dest)
 
     rc = stat(FILE_NAME, &st);
     fail_if(rc != 0, "stat failed: %s\n", strerror(errno));
-    fail_if(st.st_size != 80*2, "was %ld\n", (long)st.st_size);//should be 82 chars per log statement
+    fail_if(st.st_size != 75*2, "was %ld\n", (long)st.st_size);
 
     uc_log_remove_destination(dest1);
 
@@ -237,7 +237,7 @@ START_TEST (test_logfile_remove_dest)
 
     rc = stat(FILE_NAME, &st);
     fail_if(rc != 0, "2. stat failed: %s\n", strerror(errno));
-    fail_if(st.st_size != 80*2, "was %ld\n", (long)st.st_size);//should be same size
+    fail_if(st.st_size != 75*2, "was %ld\n", (long)st.st_size);//should be same size
 
 END_TEST