Transact SQL :: Identify Shift Which Is Falling To Next Day

I have the following shift table:

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO

[code]...

I need to identify which shift is currently running on by providing the current time.I used the following query to get the result. It is giving correct result for Morning & Afternoon Shift but failed to produce result for Night Shift.

SELECT ShiftName, Shiftid
FROM WHShifts
WHERE DATEPART(HOUR, @Currenttime)>=(DATEPART(HOUR,CAST(ShiftInTime AS Datetime))) AND DATEPART(HOUR, @Currenttime)<=(DATEPART(HOUR,CAST(ShiftOutTime AS Datetime)))

Is there any way to find out the night shift from a given time.