Hi Iryna,
Currently DropDownCalendar Control do not support to specify the number of combo items for the year section.
Using reflection, We can modify the number of Combo Items to be shown in the DropDownCalendar control. Please refer the below code snippet.
[C#]
DropDownCalendarControl DropDown = new DropDownCalendarControl();
//Access the variable 'm_iCountYearInCombo' which specify the number of combo items for the year section
FieldInfo count_Years = DropDown.GetType().GetField("m_iCountYearInCombo", BindingFlags.Instance | BindingFlags.NonPublic);
//Set new value to this variable
count_Years.SetValue(DropDown, 70);
Please refer the below sample,
http://websamples.syncfusion.com/samples/Tools.Web/5.2.0.25/F68365/main.htm Sorry for the inconvenience if any caused.
Thanks for using Syncfusion products.
Thanks,
Sureshsekaran.