Summary

Date Time Picker show "Invalid date" when the customer change
the language in the Customer Portal.

The issue was reproducible when using the following languages:

norsk, Tiếng Việt, русский (Россия), magyar (Magyarország), Dansk, suomi, íslenska (Ísland), Dansk (Danmark), polski (Polska), Eesti (Eesti), Tiếng Việt (Việt Nam), polski, 中文 (中国), svenska (Sverige), 日本語 (日本), русский, íslenska, suomi (Suomi), 中文, Eesti, Norwegian Bokmål, svenska, magyar, norsk (Norge)

Steps to Reproduce

1. Create a request type and add a field "Date Time Picker".
2. Login as a customer and change the profile language.
3. Select the request type and select a date and time.
4. Try to open a request.

Expected Results

The request is created.

Actual Results

It shows the error "Invalid date format. Please enter the date in the format "dd / MMM / yy h: mm a"." on their respective language.