大佬，能增加一个公历转化农历的工具类？

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Description

Contributor guide

Research direction

Research the algorithm for converting Gregorian to Lunar calendar and implement a utility class in Java for Android.

Tech stack

java

Domain

mobile

Issue type

Feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

Half day

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

Active

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

Clear

Prerequisites

JavaAndroidLunar calendar algorithm

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

70