Check out the Handling Time eBook to learn from the basic setup to advanced i18n usage, and from client's javascript to the server's database.
buy eBook + Example code
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Download Timepicker Addon and the required CSS.
Download/Contribute on GitHub (Need the entire repo? Find a bug? See if its fixed here)
If you prefer a hosted CDN there are a couple available: CDNJS, jsDelivr.
You also need to include jQuery and jQuery UI with datepicker and slider wigits. You should include them in your page in the following order:
Version @@version
Last updated on @@timestamp
jQuery Timepicker Addon is currently available for use in all personal or commercial projects under the MIT license.