The directory .debris is not hidden because of the hidden flag, but because it contains . in the front. By default such files and directories are not displayed in GUI (and regular CLI ls command).

You can try just to move the subdirectory 2016-07-22 outside of the hidden directory:

mv -i ./.debris/2016-07-22 ~/2016-07-22

or rename the .debris directory with:

mv -i .debris debris

The error chflags: ./.debris/: No such file or directory is however strange, maybe you were executing chflags from a different directory. To be 100% sure, use absolute paths.

I guess your .debris is in your home directory, so you can use a ~ (tilde):

mv -i ~/.debris/2016-07-22 ~/2016-07-22

or

mv -i ~/.debris ~/debris

The -i flag protects you against overwriting (and losing) files if the destination directory existed. It's not likely, but better stay safe.

The directory .debris is not hidden because of the flag, but because it contains . in the front. Such files and directories in Unix-based systems are considered hidden, and by default are not displayed in OS X GUI (and regular CLI ls command).

You can try just to move the subdirectory 2016-07-22 outside of the hidden directory:

mv -i ./.debris/2016-07-22 ~/2016-07-22

or rename the .debris directory with:

mv -i .debris debris

The error chflags: ./.debris/: No such file or directory is however strange, maybe you were executing chflags from a different directory. To be 100% sure, use absolute paths.

I guess your .debris is in your home directory, so you can use a ~ (tilde):

mv -i ~/.debris/2016-07-22 ~/2016-07-22

or

mv -i ~/.debris ~/debris

The -i flag protects you against overwriting (and losing) files if the destination directory existed. It's not likely, but better stay safe.