The black and white calendar features just a touch of colour in the form of the psychedelic pants covering the models’ modesty.
Among those to undress are back row forwards, Courtney Lawes and Teimana Harrison, who take the spot for September, while winger Ken Pisi goes it alone as Mr April. Mikey Haywood, Jamal Ford-Robinson and Paul Hill can also be seen in June.
Christian Day said: “The boys work so hard to keep themselves in great shape for their rugby that I reckon they quietly enjoy parading their muscles when they’re given a chance.
“But the real reason for supporting me in this rather unusual way is because they also want to raise as much money as possible for the charities, while I think it helped that I’m leading by example as the model for February, aided and abetted by my good mate Stephen Myler."
Christian’s limited-edition calendar will be on sale at home matches priced at £10 and can be bought on website, www.day5testimonial.com.