The colour for Saturdays is controlled by whether the underlying calendar control things it is a week-end day. I think you can set just Sunday as the week-end by editing EventMonth.ascx and adding:-

• WeekEndDays="Sunday" against the section that starts <dnn:DNNCalendar ID="EventCalendar"....

It may also be possible that this would be done automatically if you install the right language via Host/Languages, but unfortunately I can't read the non-Latin characters shown in that dialogue to recognise if there is an Indian option there.

You can make the whole week-end be the same colour as the rest of the week by edit the theme files (preferably by creating a new theme).

You can change the Month names to show << or >>  by editing EventMonth.ascx. You need to make the following changes:-

• Remove 'NextPrevformat="FullMonth"'
• Add PrevMonthText="&lt;&lt;"
• Add NextMonthText="&gt;&gt;"

Cheers
Roger

 <TD noWrap align="center"><dnn:dnncalendar id="EventCalendar" runat="server" CssClass="Event" CellPadding="0" WeekEndDays="Sunday"
                    DayStyle-VerticalAlign="Top" PrevMonthText="&lt;&lt;" NextMonthText="&gt;&gt;" ShowGridLines="True" SelectMonthText=" " SelectWeekText=" " >
                    <TodayDayStyle HorizontalAlign="Center" CssClass="EventTodayDay" VerticalAlign="Top"></TodayDayStyle>
                    <SelectorStyle HorizontalAlign="Center" CssClass="EventSelector" VerticalAlign="Top"></SelectorStyle>
                    <DayStyle HorizontalAlign="Center" CssClass="EventDay" VerticalAlign="Top"></DayStyle>
                    <NextPrevStyle HorizontalAlign="Center" CssClass="EventNextPrev" VerticalAlign="Top"></NextPrevStyle>
                    <DayHeaderStyle HorizontalAlign="Center" CssClass="EventDayHeader" VerticalAlign="Top"></DayHeaderStyle>
                    <SelectedDayStyle HorizontalAlign="Center" CssClass="EventSelectedDay" VerticalAlign="Top"></SelectedDayStyle>
                    <TitleStyle HorizontalAlign="Center" CssClass="EventTitle" VerticalAlign="Top"></TitleStyle>
                    <WeekendDayStyle HorizontalAlign="Center" CssClass="EventWeekendDay" VerticalAlign="Top"></WeekendDayStyle>
                    <OtherMonthDayStyle HorizontalAlign="Center" CssClass="EventOtherMonthDay" VerticalAlign="Top"></OtherMonthDayStyle>
                </dnn:dnncalendar></TD>