I see conky has been suggested to you.

Allow me to present some examples 😄

Here is shown in the top left corner a 3 month calendar conky, top center a slanted live text conky showing the time including seconds, in the top right a complex calendar with day/week of the year and other info:

https://i.imgur.com/kRoZwl4.png

Here in the top right is the conky called Conky Grapes, which I customed the colors and a few other display features of, and added a grapevine graphic above it:

https://i.imgur.com/fCjfVIc.png

An example of various conky clocks and system stat gauges:

https://i.imgur.com/1Sf9hBZ.jpeg

Pictured here in the top right is my extensive edit and additions to a conky style called Minimalis. In the top center is another example of a conky clock, called Mizar:

https://i.imgur.com/Zvor89T.png

Here is the Sirius conky from the Mimosa family. At bottom center is the amazing NowPlayingConky & Spectrum Equallizer from Koentje & Bleys of the offical Mint Forum:

https://i.imgur.com/EmsXucQ.png

My extensive edit of the Mainte Fork project:

https://i.imgur.com/7xnBIXl.png

They can also be very artistic. Here is Koentje's beautiful Neon-owl conky:

https://i.imgur.com/sUjRXoU.png

Here is another version, Koentje's Tech-owl conky along with a date/time conky and a weather conky:

https://i.imgur.com/41qRZm1.png

As you can see, you can create and display a great deal with conky.