Gets or sets the number of days to add or subtract from the calendar to accommodate the variances in the start and the end of Ramadan and to accommodate the date difference between countries/regions.
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This implementation of the System.Globalization.HijriCalendar class adjusts the calendar date by adding or subtracting a value from zero to two days to accommodate the variances in the start and the end of Ramadan and to accommodate the date difference between countries/regions. That value is stored in the HijriCalendar.HijriAdjustment property. If HijriCalendar.HijriAdjustment is not set explicitly, it derives its value from the settings in the regional and language options portion of Control Panel and is stored in the registry value HKEY_CURRENT_USER\Control Panel\International\AddHijriDate. However, that information can change during the life of the AppDomain. The System.Globalization.HijriCalendar class does not detect changes in the system settings automatically.