[Solved] Excel replacing a comma with a period in a number changes the format to a date

As the topic
I have the number 1.3
I replace the comma with a period and instead of the expected 1.3 I have the date
Does anyone know why
Office 365 Excel 1808 Build 10730.20280
Polish language, Windows display enabled
Polish programmer's keyboard
decimal symbol of a number = ", '

Hello,
regional settings - check what and how is defined.
greetings

Change the cell format to text and it should be OK

The creators of Excel are obsessed with replacing anything that might resemble a date with that date. And unfortunately I don't know how to turn it off. The key here is the date format set in the operating system in the regional settings, because Excel reads the default date format from it. In Windows 10 PL, the date format with dots dd.mm.yyyy was adopted as the default (previously it was with dashes) and this causes that the 1.3 entry is treated as March 1. It seems that the only solution is to change the default date format in the operating system to one with dashes, possibly with slashes (but then it will replace 1-2 or 1/2 with dates, i.e. 1/2 and so it replaces it, because it is a standard American, which Excel itself recognizes).

As he wrote Maciej Gonet the basis in Windows 10 is to change the date format in the regional settings of the operating system.
The best for the one with dashes and this applies to both the short and long dates, without that there will be constant problems with the date format in Excel

and exactly - M. Gonet's post helped precisely. I changed the date format from dot to "/" and it worked (it stopped changing to dates). I even untied another one from the same barrel. And such a general reflection. Transferring excel data between different countries - must create such confusion. We have a comma, in GB - there is a dot in the US "/" etc. There is no good solution.
Thanks to everyone and best regards.

and exactly - M. Gonet's post helped precisely. I changed the date format from dot to "/" and it worked (stopped changing to dates). I even untied another one from the same barrel. And such a general reflection. Transferring excel data between different countries - must create such confusion. We have a comma, in GB - there is a dot in the US "/" etc. There is no good solution.
Thanks to everyone and best regards.

Added after 1 [minutes]:

I followed M.Gonet's advice and it's OK