diff --git a/config.h b/config.h
index d48bd32..1711ff5 100644
--- a/config.h
+++ b/config.h
@@ -65,7 +65,7 @@ static const char unknown_str[] = "n/a";
  */
 static const struct arg args[] = {
 	/* function      format             argument */
-	{ datetime,      "%s",              "%D-%m-%d %k-%M" },
+	{ datetime,      "%s",              "%D-%m-%d %k:%M" },
 	{ run_command,   " | ",               NULL},
 	{ battery_perc,  "%s%%",           "BAT0"},
 	{ run_command,   " ",               NULL},