Broderbund Calendar Creator 6isvintage desktop publishing software that was released in 1999 for PC operating systems like Windows 95, 98, and NT. It is a physical software product that came on a CD-ROM. Due to its age, it is no longer sold or supported by the manufacturer, though original copies can occasionally be found on sale sites.
What version of Windows and/or Mac are you running? It is an older version of software so you probably need to run it on an older version of Windows/Mac. Do your due diligence before buying.