整日 Vs 整天 Is there any difference? Is there any difference between 整日  and 整天
整日 : whole day refers to only day ?
整天 : whole day refers to day &amp; night?
Dictionary Meaning:
整日 zhěngrì all day along, whole day
整天 zhěngtiān whole day
Actually they're the same, they both mean a whole day. However:

整日 is more formal; it is always used in written language.
整天 is casual, such as when your mom complaining about you:

整天玩游戏
&quot;playing games all day&quot;.