生日本 - 生日提醒 by Days Matter is a tool designed to help you remember the birthdays of your family and friends. It allows you to conveniently sort your contacts by zodiac sign, Chinese zodiac, birth month, birth date, and countdown to birthday. The app supports lunar calendar and notification reminders.

The main features include a birthday address book with powerful sorting options, such as by zodiac sign, Chinese zodiac, month, birth date, and countdown days. You can track how many years, months, and days you have been alive, set birthday reminders, explore historical events on the same day, and quickly add birthdays by importing from local contacts.