Add settings.ini setting and hwengine param to disable holiday silliness (hat changes, etc.)
settings.ini: In section [misc], add "holidaySilliness=false"
hwengine: Add --no-holiday-silliness to command-line
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>get-task-allow</key>
<false/>
</dict>
</plist>