Do you need a (like a pop-up calendar) or just date logic ?
If you provide these details, I can find the exact or latest release link for you.
If you are using a standard IDE like Eclipse or IntelliJ IDEA without a build tool: Right-click your project. Navigate to > Configure Build Path . Select Libraries and click Add External JARs . Select your downloaded calendar.jar . 2. Maven Implementation
This is the most secure and standard location. Search for "JCalendar" to find the latest versions.
com.toedter jcalendar 1.4 Use code with caution. Modern Alternatives to Calendar.jar