This tutorial talks about how to use the HTML time element and the datetime attribute to add semantic value to dates and times that are in your HTML content.
One thing that was left out of the tutorial was timezones. If you have a date-time value and want to include the time zone you can add a plus or minus sign followed by a HH:MM value.
Eg: 2019-08-24T10:00:00-04:00
represents 24 August 2019 @ 10am (4 hours behind Greenwich mean time)
Code GIST: https://gist.github.com/prof3ssorSt3v3/5930fafe9bb55cf5a6dfe2e1b70105c2
MDN Time element ref: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/time
