Ctrl+Shift+T restores past Windows.
or you can use the Menu → History and then you will see, for example, 5 tabs which means it was a window with many tabs, and there is a restore window button inside of them.
But ctrl+shift+t will restore more windows/tabs than the menu displays.
What happens when you do ctrl+shift+T? I said it doesn’t have to appear in the menu for it to work because the keyboard shortcut can bring stuff than what the menu shows.
You also have to understand, every time you close a window, and a tab, it will be added to the sessions menu, so knowing it’s been a day, it might be harder to recover stuff.
There are session manager extensions you can install that will automatically save sessions properly, so you can recover them better.