What is the name of the software that records the date?

The software that calculates days is called reverse days.

"Inverted Day" is a mobile phone calendar developed by Fan Yue Computer System Co., Ltd. It can help you to quickly record important days and schedules, so you don't have to worry about missing important schedules or being torn up because you missed the anniversary.

Functional features:

1, the screen is simple and easy to use.

2. Intimate gadgets include "Festival Countdown" and "Today in History", which make it easier for you to arrange your schedule and understand history.

3, the world time function, anytime, anywhere to view the time around the world.