To diplay todays date:

Markup Text
Displayed as
Today is !today. Today is 15 Feb, 2019.
XML is !today -xml. XML is 2019-02-15T19:46:44.
Right now it is !today -t. Right now it is 15 Feb, 2019 19:46.
Tomorrow is !today +1. Tomorrow is 16 Feb, 2019.
Last week was !today -7. Last week was 08 Feb, 2019.
The month is !today (MMM). The month is Feb.

As you can see, you can add or subtract days. You can include the time tiwh -t. And you can use your own format for the time. (See SimpleDataFormat for the syntax.)