To diplay todays date:

Markup Text
Displayed as
Today is !today. Today is 23 Apr, 2019.
XML is !today -xml. XML is 2019-04-23T13:05:19.
Right now it is !today -t. Right now it is 23 Apr, 2019 13:05.
Tomorrow is !today +1. Tomorrow is 24 Apr, 2019.
Last week was !today -7. Last week was 16 Apr, 2019.
The month is !today (MMM). The month is Apr.

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.)