Time only: HH:mm:ss or HH:mm
Date only: yyyy-MM-dd
DateTime: yyyy-MM-dd HH:mm:ss
DateTime with timezone: yyyy-MM-dd HH:mm:ss VV (VV comes from the new DateTimeFormatter and represents timezone in IANA Time Zone Database (TZDB) format e.g. Europe/London)
@rrberry In this doc https://cloud.ibm.com/docs/assistant?topic=assistant-dialog-methods#dialog-methods-dates-reformatDateTime
We need to document what formats are supported per this gh https://github.ibm.com/watson-engagement-advisor/wea-backlog/issues/54909#issuecomment-45791870