Added new kb article calendar-kb-customize-multiview-header (#2625)

* Added new kb article calendar-kb-customize-multiview-header

* Polish KB

* Update knowledge-base/calendar-kb-customize-multiview-header.md

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Co-authored-by: KB Bot <[email protected]>
Co-authored-by: Dimo Dimov <[email protected]>

Author: 3 people

knowledge-base/calendar-kb-customize-multiview-header.md

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+---
+title: Customize Month Headers in MultiView Calendar
+description: Learn how to display the month name above each view in a MultiView Calendar using a custom header template and CSS in Telerik UI for Blazor.
+type: how-to
+page_title: How to Customize Month Headers in Telerik UI for Blazor MultiView Calendar
+slug: calendar-kb-customize-multiview-header
+tags: telerik, blazor, calendar, multiview
+res_type: kb
+ticketid: 1672888
+---
+
+## Environment
+
+<table>
+    <tbody>
+        <tr>
+            <td>Product</td>
+            <td>Calendar for Blazor</td>
+        </tr>
+    </tbody>
+</table>
+
+## Description
+
+How to customize the header of a MultiView Calendar to display the month name above each month view?
+
+## Solution
+
+To display the month name above each view in a MultiView Calendar, use the [`HeaderTemplate`]({%slug calendar-templates-header%}) of the TelerikCalendar and apply custom CSS for styling for label positioning. The following example demonstrates how to achieve this customization. Note that the suggested approach is applicable only for `Horizontal` Calendar `Orientation`.
+
+>caption MultiView Calendar with Header Template.
+
+````CSHTML
+@using System.Globalization
+
+<TelerikCalendar @bind-Date="@CalendarDate"
+                 SelectionMode="@CalendarSelectionMode.Single"
+                 @bind-Value="@CalendarValue"
+                 @bind-View="@CalendarView"
+                 Views="@ViewCount">
+    <HeaderTemplate>
+        <div class="month-names">
+            @for (int i = 0; i < ViewCount; i++)
+            {
+                int monthNumber = CalendarValue.Month + i > 12 ? (CalendarValue.Month + i) % 12 : CalendarValue.Month + i;
+                string month = CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(monthNumber);
+
+                <div>@month</div>
+            }
+        </div>
+    </HeaderTemplate>
+</TelerikCalendar>
+
+<style>
+    .month-names {
+        width: 100%;
+        display: flex;
+        justify-content: space-between;
+        
+    }
+    .month-names > div {
+        flex: 1 1 auto;
+        text-align: center;
+    }
+</style>
+
+@code {
+    private int ViewCount { get; set; } = 3;
+    private DateTime CalendarDate { get; set; } = DateTime.Today;
+    private DateTime CalendarValue { get; set; } = DateTime.Today;
+    private CalendarView CalendarView { get; set; } = CalendarView.Month;
+}
+````
+
+## See Also
+
+* [Calendar Overview](https://docs.telerik.com/blazor-ui/components/calendar/overview)
+* [Calendar Header Template](https://docs.telerik.com/blazor-ui/components/calendar/templates/header-template)
+* [Calendar Views](https://docs.telerik.com/blazor-ui/components/calendar/views)