Found on hosts:

Sitename
rishabsonidesign.com
saltmadison.com
sdbc.do
www.stpatrickwadsworth.org
kbwebsite.com
www.queenmediaco.com
www.fernrossyoga.co.uk
bengumeringer.com
www.cstudio.es
beattycohan.com

How to disallow /*?month=*

User-agent: *
Disallow: /*?month=*