[FFmpeg-user] How to change recording datetime of WAV files

[Felix E. Klee]

I tried now to change the creation time, but this actually removes it:

    $ ffprobe ZOOM0004.WAV
    […]
      Metadata:
        encoded_by      : ZOOM Field Recorder F1
        date            : 2021-09-13
        creation_time   : 19:21:33
        time_reference  : 3345264000
        coding_history  : A=PCM,F=48000,W=24,M=stereo,T=ZOOM Field
                          Recorder F1
    […]
    $ ffmpeg -i ZOOM0004.WAV -metadata creation_time="03:17:33" OUT.WAV
    […]
    $ ffprobe OUT.WAV
    […]
      Metadata:
        date            : 2021-09-13
        encoder         : Lavf58.76.100
        encoded_by      : ZOOM Field Recorder F1
    […]

What’s wrong?