How to Get First and Last Day of a Year from SQL

Here is how we get first day and last day of the year.

DECLARE @Year int 
set @Year = 2018
select DATEADD(year,0,DATEADD(year,@Year-1900,0)) 
/*First Day of the year*/
select DATEADD(day,-1,DATEADD(year,1,DATEADD(year,@Year-1900,0))) 
/*Last Day of the year*/

We can also get Year dynamically from SQL by passing current date. This works form SQL 2005 and above.

SELECT Year(getdate())