diff --git a/mark b/mark
new file mode 100755
index 0000000..6a37caa
--- /dev/null
+++ b/mark
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+source ~/.markrc
+today=$(date +%Y-%m-%d\ %H:%M:%S)
+file_path=$base_path/$(date +%Y-%m).txt
+login_message=$username $today $login_message
+
+# Login if it is the first message of the day
+if [[ -f $file_path ]]; then
+  last_line=$(tail -n1 $file_path)
+  last_day=$(echo $last_line | sed 's/[^ ] [^-]*-[^-]*-\([^ ]*i\).*/\1/')
+  if [[ $last_day != $(date +%d) ]]; then
+    echo $login_message >> $file_path
+  fi
+else
+    echo $login_message >> $file_path
+fi
diff --git a/markrc b/markrc
new file mode 100644
index 0000000..730525f
--- /dev/null
+++ b/markrc
@@ -0,0 +1,3 @@
+base_path="$HOME/mark"
+username=$(whoami)
+login_message="I am in"