Jwc provides two distinct means of specifying dates.
Which is used depends on whether the user has checked Get Date From Calendar in Settings | Miscellaneous.
In most cases a Minimum Date and Maximum Date are automatically specified on using either means.
Thus you cannot go beyond the current date for events that cannot yet be in the future.
By Direct Entry:
On opening a default date is shown. To adjust click on the Down Arrow to its right and navigate through the three independent columns of a dropdown selector.
When satisfied, click OK in the selector, then click Save Exit.
Selecting in Calendar:
Simply navigate to the desired date and click Save.
Left Side Buttons govern the interior contents of the Calendar.
When opening the contents are the Days of a single Month, as shown.
Example: Clicking Months changes the contents to the Months of a Single Year, which can themselves be clicked on to return to Days of thast month.
Target Year is adjusted either with use of the top Back and Fwd (Forward) to move a year at a time within the allowable range.
Alternately the Years or Era buttons can be used to reach more remote years quickly.