Julian, I used the cass custom calendar script which gives you a choice of what type of box that you want. I choose a rounded square preset for the box, rasterized the vector and add a color that I chose from my calendar page. The script adds the calendar boxes and then asks you to choose a text. It then fills the boxes with your chosen text.
Whenever I watch a Masterclass or tutorial, I take note of what bevel Carole uses such as for flowers, paper etc. I then label it and save it in my bevels for future use.