Time unification

inventory-server/scripts/full-update.js

@@ -1,3 +1,7 @@
+// Run the whole update cycle in business time (see docs/TIME.md). The cron
+// that invokes this script does not set TZ; child scripts inherit it.
+process.env.TZ = process.env.TZ || 'America/Chicago';
+
 const path = require('path');
 const fs = require('fs');
 const { spawn } = require('child_process');