What kind of perpetual calendar is the most accurate?

Perpetual calendar is a software developed for mobile phone calendars. You can search for a large number of calendar life services in the perpetual calendar app, including weather forecast, intelligent synchronization, life notes and other functions to serve you.

Brief introduction of perpetual calendar app

1, calendar: just look at the lunar calendar, and the festival has complete solar terms.

2. Weather: a strategic partner of China Weather Network, supporting the weather background to change with the weather and providing all-round information such as air quality and disaster warning; ?

3, personalized reading: news, parents, emotions, travel, events ... Customize your personal reading taste, we all understand what you care about; ?

4. Birthdays, anniversaries and countdown days: support one-click import of address books and important dates on social networks; ?

5. Remarks: Support for multiple and regular reminders, and support for adding graffiti, recording and other information; ?

6. Cloud synchronization: support real-time synchronization of mobile phones, PADs and web pages; ?

7, practical tools: dream interpretation, menstruation, auspicious day, seeking wallpaper ringtones ... the perfect combination of traditional culture and modern life; ?

8. Personal customization: support full-screen and half-screen calendar styles and various theme skins.

Complex working principle of perpetual calendar watch

Inside it, there is a toothed car that only rotates once every four years. This kind of gear car is responsible for promoting month switching and leap year indication, and usually adopts the indication mode of "L (leap year), 1, 2,3". Every 48 months, the groove on the wheel has four depths, representing 3 1, 30, 29 and 28 days respectively. The positioning lever directs the 28th jump to 1, 29th jump to 1, 30th jump to 1, and 3rd jump to the end of the month 1. The principle of a watch is often easier said than done, but just like using a mobile phone, the mobile phone penetration rate in Taiwan Province Province should be close to 100%, but how many people really understand its working principle? In fact, we don't need to know the details of the mobile phone, as long as we know the simple principle and can use it. The week is an easy-to-handle unit, with 7 fixed days per week, neither more nor less. So the function is to add a 7-tooth gear car, and the hour hand completes one turn every 7 days (14 turn). The moon phase is more complicated, because it is calculated according to the lunar calendar, and each month is 29 days, 12 hours and 44 minutes. Accuracy depends on whether you are willing to put in accurate parts. The simplest moon phase is that there is a difference of one day between two months, and the more complicated is 122 or even a thousand years.

In addition, there are almanacs, which are between ordinary watches and perpetual calendars. Theoretically, it has a toothed car that completes one lap a year, and there will be two deep grooves on the toothed car, the big moon and the small moon, so that the positioning structure can switch the jumping mode between the big moon and the small moon, but it must be manually adjusted in February; Although it is not as complicated as a calendar, it is much more affordable.