When do the shenanigans start at one minute past midnight on march 17th when we all become irish for one day and celebrate st patrick by getting drunk on green guinness and singing pogues songst shirt design reads when do the shenanigans start our crew neck short sleeved mens t shirts are 100 premium cotton in a soft pre shrunk jersey knit our womens t shirts are lighter weight 150g tees made with deluxe 30s soft style yarns for a soft feel