It's a little weird to convert the date of the android lunar calendar

https://github.com/unicode-org/icu/releases/tag/release-4-8-2

Using the library

Trying to get lunar date

But it's working well

February and March alone are one day behind.

In this sauce, February 28, 2020 of the solar calendar comes out as February 6 of the lunar calendar.

If you look back on other search engines, it comes out on February 5th of the lunar calendar.

Just in case, when I received another Android app, it came out on February 5th

Is there any other library besides this one?

Does anyone know why? Thank you^{^}