You are able to localize only the minute/ minutes , hour/ hours and day/days options of the RadComboBox via the following properties of the RadScheduler:
Localization-ReminderMinute="your text here"
Localization-ReminderDay="your text here"
Localization-ReminderHour="your text here"
the Telerik team
Registration for Q1 2011 What’s New Webinar Week is now open. Mark your calendar for the week starting March 21st and book your seat
for a walk through all the exciting stuff we ship with the new release!