Dates entered in newsletter cannot handle NL -> EN

Ayala Hoeks
2019-01-30T19:38:02+01:00

One-sentence description

Dutch dateformat cannot switch to English

Current behaviour / Reproducing the bug

When making the newsletter, dates are entered, during in-between saving the language the site is in changes. If the language (in another tab) changes from English to Dutch, the format the dates are in is changed accordingly. The other way around, from Dutch date format to English, does not work. The newsletter cannot change them and sees them as invalid

1. Enter a date

2. Change language from Dutch to English

3. Invalid date

Expected behaviour

I expected the date to change back to the English format, or not to change at all, or maybe that both get accepted.