diff --git a/cmake/today.cmake b/cmake/today.cmake
index 51d0031a8..8d008525c 100644
--- a/cmake/today.cmake
+++ b/cmake/today.cmake
@@ -7,7 +7,11 @@ MACRO (TODAY RESULT)
         EXECUTE_PROCESS(COMMAND "cmd" " /C date +%Y-%m-%d" OUTPUT_VARIABLE ${RESULT})
         string(REGEX REPLACE "(..)/(..)/..(..).*" "\\1/\\2/\\3" ${RESULT} ${${RESULT}})
     ELSEIF(UNIX)
-        EXECUTE_PROCESS(COMMAND "date" "+%Y-%m-%d" OUTPUT_VARIABLE ${RESULT})
+        if (DEFINED ENV{SOURCE_DATE_EPOCH})
+            EXECUTE_PROCESS(COMMAND "date" "-u" "-d" "@$ENV{SOURCE_DATE_EPOCH}" "+%Y-%m-%d" OUTPUT_VARIABLE ${RESULT})
+        else ()
+            EXECUTE_PROCESS(COMMAND "date" "+%Y-%m-%d" OUTPUT_VARIABLE ${RESULT})
+        endif ()
         string(REGEX REPLACE "(..)/(..)/..(..).*" "\\1/\\2/\\3" ${RESULT} ${${RESULT}})
     ELSE (WIN32)
         MESSAGE(SEND_ERROR "date not implemented")