let's make sure we're looking at same button
View attachment 66982
it's the clock with the green back arrow
it's the luck of the draw for your area what images are available, it depends upon when the aerial photo planes flew over that area
if they are on a schedule then certain areas might not get winter images (just guessing) or maybe some areas are more or less safe to fly in winter and that adjusts things
but google also might not be showing everything available
i would also google
aerial photos
or something similar and look for your area
i forget the names of the agency programs that did/do these, and will try to find some search terms
this will get you started hopefully, most images can probably be downloaded and then imported into google earth (with maybe some steps in there....things like this aren't often easy)