chdate
A command-line app that prints the next n Gregorian (Western) dates on which a given Chinese lunar month (yue) and day (ri) occur
Usage: chdate yue ri [n]
If not specified, n defaults to 3.
Example: When are the next three Double Ninth Festivals?
Command: chdate 9 9
Result: [ '2020-10-25', '2021-10-14', '2022-10-04' ]
Installation
Depends on npm and node from https://www.npmjs.com/get-npm, and the lunar-javascript node module.
If you install node and lunar-javascript globally (sudo npm install npm -g; sudo npm install lunar-javascript -g),
then you can copy chdate to any folder on your path.
Make chdate executable (chmod +x chdate) and it's ready to use.