diff --git a/tagger b/tagger
index 22122a1..3dc5991 100755
--- a/tagger
+++ b/tagger
@@ -1,9 +1,14 @@
 #!/usr/bin/python3
 
+import argparse
 import datetime
 import re
 import subprocess
 
+ap = argparse.ArgumentParser()
+ap.add_argument("--fullyear", action="store_true")
+args = ap.parse_args()
+
 subprocess.run(["git", "pull"])
 result = subprocess.run(["git", "log", "--pretty=format:%H %D", "--date-order"], stdout=subprocess.PIPE, universal_newlines=True)
 found_tags = set()
@@ -20,7 +25,10 @@ for ln in result.stdout.split("\n"):
 print(need_tag, found_tags)
 if need_tag:
     today = datetime.date.today()
-    tag = today.strftime("r%y.%m.%d")
+    if args.fullyear:
+        tag = today.strftime("r%Y.%m.%d")
+    else:
+        tag = today.strftime("r%y.%m.%d")
     if tag in found_tags:
         inc = 1
         while f"{tag}.{inc}" in found_tags: