Export failure

[OkazakiNagisa]

Since evernote hasn't a feature like pin-to-top, I modify the update time of certain notes to 30YY-MM-DD as an alternative. However these notes cannot be exported and the app crashes. Here is the log print:

Exporting note 'xxx' [xxx], notebook_id [xxx]
Traceback (most recent call last):
  File "evernote_backup\cli.py", line 272, in main
  File "site-packages\click\core.py", line 1137, in __call__
  File "site-packages\click\core.py", line 1062, in main
  File "site-packages\click\core.py", line 1668, in invoke
  File "site-packages\click\core.py", line 1404, in invoke
  File "site-packages\click\core.py", line 763, in invoke
  File "evernote_backup\cli.py", line 237, in export
  File "evernote_backup\cli_app.py", line 146, in export
  File "evernote_backup\note_exporter.py", line 52, in export_notebooks
  File "evernote_backup\note_exporter.py", line 77, in _export_active
  File "evernote_backup\note_exporter.py", line 88, in _export_notes
  File "evernote_backup\note_exporter.py", line 116, in _output_notebook
  File "evernote_backup\note_exporter.py", line 141, in _write_export_file
  File "evernote_backup\note_formatter.py", line 26, in format_note
  File "evernote_backup\note_formatter_util.py", line 9, in fmt_time
OSError: [Errno 22] Invalid argument