I'm adding a test to TestSimpleTypes under scala-debug to illustrate this.

test_dateTime_calendarPattern_EscapeCharacter

Essentially, I should be able to have a format such as "yyyy-MM-dd'Thh:mm:ss" as the calendarPattern. The T is escaped by the single quote character. Currently the regex replacement code in PrimitivesDateTime does not remove the "'T" before validating the pattern contents for allowed characters. This results in an SDE and it shouldn't.