The dates in your example file use an adaptable format.
This type of format is written to the file in US version. When you open the file in Excel, the application takes into account the format defined in the control panel and tailors.
If you want to reproduce this operation directly in php, I think you should implement what Excel do : make a transcript between the US and the desired local format (there are two formats date and two time formats).
This type of format is written to the file in US version. When you open the file in Excel, the application takes into account the format defined in the control panel and tailors.
If you want to reproduce this operation directly in php, I think you should implement what Excel do : make a transcript between the US and the desired local format (there are two formats date and two time formats).