How to write DateTime validation in the fields...workScope_plannedStart_date datetime, workScope_actualStart_date datetime, workScope_plannedFinish_date datetime, workScope_actualFinish_date datetime

vesselc	nvarchar(20)	
workScope_id bigint,	
asset_id bigint,	
proj_id	bigint,
workScope_date	datetime,	
workScope_no	nvarchar(50),	
workScope_activityNo	nvarchar(20),	
workScope_plannedStart_date	datetime,	
workScope_actualStart_date	datetime,	
workScope_plannedFinish_date	datetime,	
workScope_actualFinish_date	datetime,	
workScope_Location	nvarchar(100),	
workScope_ActivityTitle	nvarchar(MAX),	
workScope_Completion	nvarchar(100),	
workScope_status	nvarchar(50),	
workScope_createdby	nvarchar(30),	
workScope_createddate	datetime,	
workScope_updatedby	nvarchar(20),	
workScope_updateddate	datetime,	
workScope_deleted	bit,	
workScope_transfer	nvarchar(1),	
dpr_no	nvarchar(10),	
dpr_date datetime,