It's the default formats for DATE/TIME/TIMESTAMP (in that order) and indicates INTEGER or ANSI.
For DATEs both is ok (similar to SET SESSION DATEFORMAT), but for TIME and TIMESTAMP ANSI is preferred, I was used historically before there was the datatypes TIME and TIMESTAMP.
It's the default formats for DATE/TIME/TIMESTAMP (in that order) and indicates INTEGER or ANSI.
For DATEs both is ok (similar to SET SESSION DATEFORMAT), but for TIME and TIMESTAMP ANSI is preferred, I was used historically before there was the datatypes TIME and TIMESTAMP.
Dieter