I suppose you have a date picker control placed on a page that is configured to show arabic time. In Sitefinity is you create a control with RadDatePicker it will not show dates in arabic if it is not configured to load the calendar for this culture (by default is loads gregorian calendar).
When Arabic is added as a translation to the english pages the current UI culture is changed to "ar" and all controls that support System.Globalization seek to load that culture. If the RadDatePicker is configured to specifically show arabic time I think it will do so in english pages too.
Review this demo and add additonal logic to the date picker to detect the current ui culture and load different calendar when the culture is "en" or "ar".
This gets the current culture.
var currentCulture = Thread.CurrentThread.CurrentUICulture;
I Have a site on which I am working on it right now. it has 2 languages EN and AR. Now the problem is that in arabic Site dates are shown in hijri format but I want to show it as gregorian format.
for example Date in en site looks like this : 31 July 2016 but same date in arabic site is Displayed like شوال 26, 1437 I want to display all the dates as en site format that is in english
if there any setting available Please do let me know