"Dimasalang Kalendariang Tagalog" is a collection of calendar materials in the Philippines that was published in 1922. The book's author, Honorio Lopez, a well-known Filipino historian and cultural expert, researched and documented the traditions and customs of the Filipino people. The book collects various data on traditional holidays, rites, customs and beliefs that were common among the Tagalog population of the Philippines. Through this book, readers can better understand the rich culture and heritage of the Filipino people. "Dimasalang Kalendariang Tagalog" has become not only a source of interesting information, but also an important document for the study of Philippine history and culture.