This sheet was an example this not needs to modify.
Here is the original sheet which was attached in first comments,
I just want that i have below sheet and there is 1 format in it, i want to attached this format with date validation for 1 month and so on,
If i put some text in format cells today and change the date then previous written format should be saved with the date and also format should be empty to mention new text for new date.