Google’s Zineb Ait Bahajji shared on Google+ a change in how Google generates the URLs for the Search Analytics date range based reports in the Google Search Console. Now if you ask for the last 7 days or last X days, the URL will be dynamic and relative in nature.
That means if you bookmark the URL or share it with someone else and they go to the URL tomorrow, it will retain the last seven days and not stick you to an older date range.
Zineb explained it best:
Here is one webmaster’s reaction to this update:
So for those of you who want to do a quick check on the last X days and bookmark it for later, you can do that now with ease and efficiency.
Forum discussion at Google+.