bsd/macOS friendly version calculation (#1027)

Author: mr-c

Makefile

@@ -30,8 +30,8 @@ DEVPKGS=pycodestyle diff_cover autopep8 pylint coverage pydocstyle flake8 \
 	pytest pytest-xdist isort
 DEBDEVPKGS=pep8 python-autopep8 pylint python-coverage pydocstyle sloccount \
 	   python-flake8 python-mock shellcheck
-VERSION=1.0.$(shell date +%Y%m%d%H%M%S --utc --date=`git log --first-parent \
-	--max-count=1 --format=format:%cI`)
+VERSION=1.0.$(shell TZ=UTC git log --first-parent --max-count=1 \
+	--format=format:%cd --date=format-local:%Y%m%d%H%M%S)
 mkfile_dir := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 UNAME_S=$(shell uname -s)
 ifeq ($(UNAME_S),Linux)