# range(of:in:for:) Returns the range of absolute time values that a smaller calendar component (such as a day) can take on in a larger calendar component (such as a month) that includes a specified absolute time. ``` func range(of smaller: Calendar.Component, in larger: Calendar.Component, for date: Date) -> Range? ``` ## Parameters `smaller` The smaller calendar component. `larger` The larger calendar component. `date` The absolute time for which the calculation is performed. ## Return Value The range of absolute time values smaller can take on in larger at the time specified by date. Returns `nil` if larger is not logically bigger than smaller in the calendar, or the given combination of components does not make sense (or is a computation which is undefined). ## Discussion You can use this method to calculate, for example, the range the `day` component can take on in the `month` in which `date` lies. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)