diff --git a/Makefile b/Makefile
index 90cb72e7..f6b7a83e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,7 @@
 PKG = github.com/k1LoW/runn
 COMMIT = $$(git describe --tags --always)
 OSNAME=${shell uname -s}
-ifeq ($(OSNAME),Darwin)
-	DATE = $$(gdate --utc '+%Y-%m-%d_%H:%M:%S')
-else
-	DATE = $$(date --utc '+%Y-%m-%d_%H:%M:%S')
-endif
+DATE = $$(date '+%Y-%m-%d_%H:%M:%S%z')
 
 export GO111MODULE=on