Steps to Reproduce

1. run the zul

<datebox format="KK:mm a" lenient="true"/>

2. enter 03:00 am, press tab

Current Result

Datebox shows 03:00 PM

Expected Result

03:00 AM

Debug Info

Root Cause

• Datebox only compares with uppercase string "AM"

Workaround

• see attached js
  isAM = token.toUpperCase().startsWith(localizedSymbols.APM[0]);