For more context, see discussion here #10453

Description of the Issue

Steps to Reproduce the Issue

1. Settings > Preferences > Multi-Instance & Date
2. Custom Format

Expected Behavior

A way to specify short year, etc.

Actual Behavior

No way to specify short year (e.g. 98), leading zeroes in month and day (01), etc.

Debug Information

Notepad++ v8.1.4 (64-bit)
Build time : Aug 30 2021 - 20:46:31
Path : ...\Notepad++.exe
Command Line : -multiInst -nosession
Admin mode : OFF
Local Conf mode : OFF
Cloud Config : OFF
OS Name : Windows 10 Enterprise (64-bit)
OS Version : 2009
OS Build : 19043.1165
Current ANSI codepage : 1252
Plugins : none