June Holiday Promotion Terms & Conditions. On Sunday 4th and Monday 5th June, Equipet customers will receive 18% OFF products online. June holiday promotions will apply from 12.01am Sunday 4th June - 11.59pm on Monday 5th June 2017. This offer will replace exsisting offers and excludes horse wormers. No online promo codes, including newsletter/Grabone signups/Facebook promo codes will be functional during June Bank Holiday promotional period.