There seems to be a bug in the way that the Daily historic data is displayed in the browser extension - the dates are formatted as DD.MM.YYYY -- but the YYYY part always seems to be the current year.
This is visible when viewing historic data across the Y2025/Y2026 year boundary; please see the example attached below:
Instead of 25.12.2026 -- a date currently in the future as I write this -- the data in that entry is from last year and should be annotated as 25.12.2025.
NB: as a nitpick, it is also a little unusual that the month-parts are zero-padded (e.g. January == 1 becomes 01, not 1) while the day-parts are not (second day of the month == 2 becomes 2, not 02).