Date in Copy II Plus 8.5ɑ2 gets mangled on clockless //e

[hackerb9]

Expected Behavior

Copy II Plus 8.5ɑ2 — which comes with ProDOS 2.5ɑ8 — should ask for the date on a clockless Apple II and then use it.

Actual Behavior

Copy II Plus asks for the date and then changes it to something completely different.

Steps to Reproduce

1. Download ProDOS 2.5ɑ8 at https://prodos8.com/releases/prodos-25/ and write it to a 5¼" disk.
2. Boot on a clockless Apple II
3. From the menu select /CopyIIPlus.8.5 and then UTIL.SYSTEM.
4. Type the date and hit Return. (For example, I entered 04APR202310:15.)
5. Note that CopyIIPlus now shows the date incorrectly at the bottom of the screen. (For example, I now see 01-Ode2017 0:15)

Context

Note that this is not a Y2K bug. If I enter the date as 09 September 1999, I am told that the year is now 2037.

Your Environment

Hardware:

128K Apple //e Enhanced with no hardware clock.

Probably irrelevant, but included for completeness: 80 Column Card, Disk II Card, MicroSoft Softcard, Super Serial Card, and Quark Keyboard Dongle (WordJuggler DRM).

ProDOS8 version:

ProDOS8 2.5 Alpha 8

Non-Operating System release software being used:

CopyIIPlus 8.5a2

Side Question

This version of CopyIIPlus (called "8.5") was modified for the ProDOS 2.5 to handle lowercase and 4-digit dates, but in several ways is not as usable as the version it was based on (8.4). Since this software is still in alpha, it seems like a good time to look at the design before it gets baked in. Is this project open to bug reports on usability issues? Thanks!