The Calies are well supported by a group of leading calendar publishers, diary manufacturers and dedicated trade suppliers.

Headline sponsors for 2019 include Calendar Club, Carousel Calendars, Danilo, Eight Days A Week, Premier Paper, Renz, Rose Calendars and PG Live. In addition a number of leading names have added their endorsement as official supporters. These include Allan + Bertram, Andrews McMeel Publishing, Avonside, BrownTrout, Flame Tree Publishing, Grange, Graphique de France, Pomegranate, Pyramid International, Reeve Calendars, Tallon, Tams Packaging and TeNeues.