diff --git a/startsway b/startsway
index 76338db..5d07c11 100755
--- a/startsway
+++ b/startsway
@@ -21,7 +21,7 @@ mkdir -p "$LOG_DIR"
 mv "$LOG_DIR/sway.log" "$LOG_DIR/sway.log.latest"
 
 # print date and time information at the top of the log file
-date '+%Y-%d-%mT%T %Z' >"$LOG_DIR/sway.log"
+date '+%Y-%m-%dT%T %Z' >"$LOG_DIR/sway.log"
 
 # count the number of previous log files
 count=1