To diplay todays date:

Markup Text
Displayed as
Today is !today. Today is 17 Sep, 2021.
XML is !today -xml. XML is 2021-09-17T09:57:39.
Right now it is !today -t. Right now it is 17 Sep, 2021 09:57.
Tomorrow is !today +1. Tomorrow is 18 Sep, 2021.
Last week was !today -7. Last week was 10 Sep, 2021.
The month is !today (MMM). The month is Sep.

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.)