It seems if you compare the old Google Search Console Search Analytics report to the new Google Search Console Search Performance report, you will see the new report is a day off. It seems the old report is the correct day, while the new report shows a date ahead. The data is right, but the date is one day ahead in the new Search Performance report.
Here are screen shots:
Old Report:
New Report:
Same data, as you can see, but the date is one day ahead in the new report.
This was first spotted by Sara who posted this on Twitter:
New Google Search Console is off by one day; Monday and Tuesday's data (in the old version) is showing up as Sunday and Monday in the new version. The old version is correct. Anyone else noticing this? pic.twitter.com/69ffSziucX
— Sara Grube (@SaraLGrube) January 11, 2018
Google has not confirmed the issue, it is not a huge issue, as the new version is still beta and most people do not yet have it yet. It is just something you should be aware of.
Forum discussion at Twitter.