Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -r22dc8daefbb24bd2a2ea6f0a2465c6714267638c -r5b448e81db260e5b041699a83c6f2a3faa260ea9
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 22dc8daefbb24bd2a2ea6f0a2465c6714267638c)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 5b448e81db260e5b041699a83c6f2a3faa260ea9)
@@ -46,6 +46,7 @@
 // ********** private definitions **********
 
 #define DISINFECTS_DATA_PUB_INTERVAL          ( 1 * MS_PER_SECOND / TASK_GENERAL_INTERVAL )    ///< Disinfects data publish interval in counts.
+#define SERVICE_TIME_INTERVAL_MS              ( 6 * 30 * SECONDS_IN_A_DAY * MS_PER_SECOND )    ///< HD/DG 6-month service interval in milliseconds.
 
 // ********** private data **********