In case of purchase new tangible asset (says, a car) in January, the company still holds it in store and does not intend to use it in next several months (until July, for example). So it is available to use at Jan, we will depreciate it from January?
If it is ready for use then it is depreciated, feel free to use it in July and leave it in the garage for several months unused but it would be better to delay the purchase until it is actually needed.