Find java perpetual calendar code

Now the perpetual calendars provided on the Internet basically have the functions you mentioned. Except for the "alarm clock" function.

You can open a perpetual calendar, such as http://wentong.org/wannianli/,, right click, view "source code", and copy and save the source code as a web page (suffix. htm）。 Alternatively, you can simply click File-Save As in the menu.