diff --git a/logs.lua b/logs.lua
index 3215f87..5636daf 100644
--- a/logs.lua
+++ b/logs.lua
@@ -112,7 +112,7 @@ ashita.register_event('incoming_text', function(mode, message, modifiedmode, mod
 
     -- Create the file name and ensure the path to it exists..
     local d = os.date('*t');
-    local n = string.format('%s_%.2u.%.2u.%.4u.log', name, d.month, d.day, d.year);
+    local n = string.format('%s_%.4u.%.2u.%.2u.log', name, d.year, d.month, d.day);
     local p = string.format('%s/%s/', AshitaCore:GetAshitaInstallPath(), 'chatlogs');
     if (not ashita.file.dir_exists(p)) then
         ashita.file.create_dir(p);
diff --git a/rename-logs.ps1 b/rename-logs.ps1
new file mode 100644
index 0000000..6a263bd
--- /dev/null
+++ b/rename-logs.ps1
@@ -0,0 +1,4 @@
+$Search ='^(?<Name>.+)_(?<Month>\d\d).(?<Day>\d\d).(?<Year>\d\d\d\d).(?<Ext>.*)$'
+$Replace ='${Name}_${Year}.${Month}.${Day}.${Ext}'
+
+ Get-ChildItem | where {$_.name -match $Search} | Rename-Item -NewName {$_.name -replace $Search,$Replace}
\ No newline at end of file