Hello @Ercy0,
Do you mean that you don't want to have anyone stay for those dates, March 8 to 25? You can still receive booking requests, during those dates, for other later dates.
If this is it then you can go to your calendar and click on the first date that you wish to block, in this case the 8th of March. A box will appear on the right. In the "Selected dates" box click on the date to the right of the "->" arrow and enter the last date you wich to block, that is the 25th of March. Now click on the little circle for "Blocked" and then on the "Save" button. Remember that people will still be able to check in before the 8th and check out on the morning of the 8th. If you don't want checkouts on the 8th you must block previous dates as well.
If you mean that you don't wish to receive any booking requests during March 8 to 25, even if they are for stays on other dates, like in April, then you must snooze your listing for those dates. Guests could still stay in your listing during those dates.
To do this, click on "Host" and then on "Listings" and then on the photo of the listing and scroll to the end of the page. Click on the "Edit" button in the "Listing status" section and click in the "Listed" box and choose "Snoozed". Follow the instructions from there to enter the dates.
Steve.