Describes the cause and action for error messages.
Error Message(English)：
cannot change time format
Unable to Change Date Format in Excel ? You need to watch this ...
https://www.youtube.com/watch?v=ngAE0dME9RA
https://www.youtube.com/watch?v=ngAE0dME9RA
Solved - Excel Dates Won't Change Format - YouTube
https://www.youtube.com/watch?v=gcx7lQam0ac
https://www.youtube.com/watch?v=gcx7lQam0ac
Date Formatting Won't Change - Microsoft Tech Community - 174102
https://techcommunity.microsoft.com/t5/Excel/Date-Formatting-Won-t-Change/td-p/174102
How to change Excel date format and create custom formatting
https://www.ablebits.com/office-addins-blog/2015/03/11/change-date-format-excel/
Excel date format
https://www.ablebits.com/office-addins-blog/2015/03/11/change-date-format-excel/#excel-date-format
Default date format in Excel
https://www.ablebits.com/office-addins-blog/2015/03/11/change-date-format-excel/#default-date-format・・・
How to change date format ...
https://www.ablebits.com/office-addins-blog/2015/03/11/change-date-format-excel/#change-date-format