About: http://demo.openlinksw.com/postgres_postgres_jdbc_mt_codex

About: http://demo.openlinksw.com/postgres_postgres_jdbc_mt_codex_20260403/calendar/date/2024-01-01#this

Attributes	Values
type	postgres.postgres_jdbc_mt.calendar
date	2024-01-01 00:00:00 (xsd:dateTime)
publicholiday	Y
weekday	Monday
ym	2024-01