Time range to search e.g. find files created between 8:00 and 9:00 AM today

[Biff]

Where / how could I set the time range to search e.g. find files created between 8:00 and 9:00 AM:

[void]

The advanced search only supports dates.

If you wish to specify dates with times, please use ISO 8601 dates:
dc:20170608T08:00-20170608T09:00

The syntax is very relaxed, so searches like the following will also work:
dc:2017-6-8T8:00-2017-6-8T9:00
dc:8/6/2017T8:00-8/6/2017T9:00

[Biff]

Many thanks.

The syntax is very relaxed, so searches like the following will also work:
dc:2017-6-8T8:00-2017-6-8T9:00
dc:8/6/2017T8:00-8/6/2017T9:00

Good, that looks a bit clearer.

Those syntaxes ("dc"?) are for the file creation date / time. "dm" for modification dates / times? And last access?

Is there a manner to create such a string automatically / with a program or does one have to enter it completely manually?

Many thanks again