Widget for week number et date of the week number

Hello everyone,

I would like to have a widget with the Week number of the actual week and the date of begin and end of this week number. For exemple Week 1 : 01/01/2019 to 07/01/2019, week 2 : 08/01/2019 to 15/01/2019. So you first see the actual week and you can chose the week you want to see.

Do you know if a widget like that exist ? Or do you have an idea of the code to create it ?

Regards.