Perpetual Birthday Calendars

Today I bought removable labels to try on the perpetual calendars. Originally I liked the idea of making the calendars out of mdf with decoupage and paint, ink, etc, something permanent, but with removable stickers for updating with the information personal to each client. Now I'm not sure if this is the best way to go. I'm going to look into having them printed. The reason is that I think people might need a different page for each month, they might need more room for names and dates.