Nsdateformatter returns me day in language of the phone selected. Can it return me only English all the time?

Add the following lines to the dateformatter.

NSLocale *usLocale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];
[dateFormatter setLocale:usLocale];

In your case,

NSDateFormatter *objTimeFotmatter=[[NSDateFormatter alloc]init];
[objTimeFotmatter setDateFormat:@"HH:mm"];
NSLocale *usLocale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];
[objTimeFotmatter setLocale:usLocale];

Similarly for all dateformatters.

Swift

let dateFormatter = DateFormatter()
dateFormatter.locale = NSLocale(localeIdentifier: "en_US") as Locale!
dateFormatter.dateFormat = "dd-MM-yyyy HH:mm:ss"
let resultsDate = dateFormatter.string(from: date)