Thank you for your help, all worked !
I have 2 other things:
1/ For the calender block, when I am in the mobile format, I can't scroll the text in the hover of the event as it is in the computer format. (I attached 2 pictures mobile and computer format to see the difference)
I would like to be able to scroll the text in the hover of the event in mobile format.
2/ Attached I sent another picture - in mobile format, when I click on a event, I scroll down the all description and at the bottom, the typo/police of the text for the other event is too big.