Dates may appear in a different format in the Enterprise web browser application as opposed to the desktop application if your web browser has a different locale (region) setting to the Enterprise server.
For Internet Explorer, Edge and Safari, the browser's locale settings are the same as your computer's region settings. To check these in Windows, search for "Date & Time settings". On MacOS, you'll find these under System Preferences, and iOS under Settings/General.
For Chrome and Firefox, the date format is set as part of the Language setting, found under Settings/Advanced in Chrome, and Options/General in Firefox. Please ensure that your preferred language is at the top of the list. In Chrome, ensure that "Display Google Chrome in this language" is selected.
In Android Chrome, the Language setting is tied to the region setting of the device, and can be changed under Settings/System/Languages & Input. Ensure your preferred language is at the top of the list.