Improve date on front page

[Benjamin Wolf]

Currently, the date is displayed as follows:

English: Version 1.0.0-EN, November 9, 2019 
German: Version 1.0.0-DE, 9. November 2019

This only works in the German format, but the English one looks bad. It should look the same as it does in the footer, which is:

English:
Version 1.0.0-EN; November 9, 2019