Discuss! Plugin: Little Ant Korean Perpetual Calendar

I. Plugin Description
Xiaoyi Korean Perpetual Calendar is a Fujian Xiaoyi Network Technology platform for Discuz! A professional calendar plugin created by the community. The plugin, centered on "Korean Calendar Query," integrates the Gregorian calendar, Korean lunar calendar, zodiac signs, 24 solar terms, Korean public holidays, and Chinese statutory holidays into a single calendar. It simultaneously provides practical functions such as two-way conversion of the lunar and solar calendars, countdown to the next public holiday, and a list of this month's schedule. It is presented in a responsive layout for both PC and WAP, and is compatible with Chinese, Korean, and Traditional Chinese language environments.

All core algorithms and resources of the plugin are implemented locally, do not rely on any remote interfaces, and are stable and reliable upon installation. All data and function switches can be visually configured in the background without modifying any Discuz core files. They are fully supported by the system's native hooks and plugin mechanisms, ensuring security, compliance, and worry-free upgrades.

In short: Install "Korean calendar + Chinese and Korean holidays + 24 solar terms + lunar and solar calendar conversion" into a plugin, and both Chinese and Korean websites can be installed and used immediately.

II. Core Functions
1. Same-screen comparison of Chinese and South Korean calendars: South Korean public holidays are marked in red, Chinese statutory holidays are marked with green underlines, and Chinese adjusted working days are marked with gray underlines. Holidays in both countries are displayed side by side on the same day and will not interfere with each other.
2. Complete calendar information: Gregorian calendar, Korean lunar calendar (including leap months), stem branches, zodiac signs, 24 solar terms and their interpretations, all on one screen.
3. Automatic switching of the 24 solar terms: Supports three modes: "automatically switching the top large image according to the current solar term", "fixed image" and "fixed image + switching on the day of the solar term". It has multiple built-in sets of solar term icon libraries, which can be freely changed in the background.
4. Holiday data system: Built-in public holidays in South Korea in 2026/2027 and statutory holidays in China in 2026 (including working days with adjusted holidays); It adopts a three-level priority system of "built-in algorithm → official/import annual data → webmaster-defined overlay", supports backend forms, batch input and JSON import and export, and can be maintained independently in future years.
5. Bidirectional conversion of lunar and solar calendars: Gregorian calendar to lunar calendar, lunar calendar to Gregorian calendar (supports leap months), providing instant results.
6. Schedule and Countdown: Displays the main schedule, anniversaries, traditional festivals, and lossless days for this month, as well as the next public holiday and the remaining days.
7. Multilingual and multi-device support: Simplified Chinese, Traditional Chinese, and Korean trilingual package, front-end switchable; Separate templates for PC and WAP, providing a complete mobile experience.
8. SEO Enhancements: Supports fourteen placeholder templates for titles, summaries, and keywords, outputs canonical self-citations, robots directives, and Open Graph/Twitter social sharing cards (including 1:1 share thumbnail uploads), helping search engines index and spread social media.
9. Visualization Backend: Basic and Display, SEO Settings, Solar Term Images, Annual Holidays, Batch Adding, Custom Dates, Translation Interface, Data and Description, totaling eight modules, all operated graphically.
10. Optional intelligent translation: The background can be connected to NiuTrans (NiuTrans) for one-click translation, the built-in local glossary prioritizes matching, and matching terms does not consume interface quota; Core functionality is completely unaffected when not enabled.
III. Product Selling
- Differentiated positioning, filling gaps: Most calendar plugins on the market focus on the lunar calendar or a single festival. This plugin pioneered an integrated solution of "Korean calendar + Chinese and Korean holidays on the same screen" to accurately serve vertical scenarios such as Chinese and Korean bilingual communities, Korean culture, study abroad and immigration, and cross-border e-commerce.
- Right out of the box, no configuration burden: Built-in official annual holiday data for South Korea and China, automatically written upon installation, no manual organization required by website owners, zero barriers to operation.
- Zero external dependencies, stable and efficient: Calendar conversion, solar term calculation, holiday algorithms, image and script resources are all localized, do not rely on any third-party interfaces, load quickly, have no risk of failure, and are more secure in long-term operation.
- Compliant and secure, passing review standards: native system hooks and plugins are used throughout the entire process, without changing the core; Database operations are uniformly performed using Discuz's built-in DB class and parameter filtering; The input and output are processed by native security functions, and have CSRF token verification and permission control, which fully complies with the application center listing specifications.
- Highly customizable, balancing individuality and uniformity: Multiple built-in theme color schemes and support custom main colors. The large top image, solar term icons, display item switch, and weekly start date can all be freely adjusted according to the site's tone.
- Clean uninstallation, no residue: Equipped with installation, upgrade, uninstallation and self-test scripts, the plugin data can be completely cleaned during uninstallation, leaving no dirty data.