common date manipulation to get EOM/BOM values

dateSnippets.sql

declare @Date date = getdate()
select
	previous_month_bom =	dateadd(month, datediff(month, 0, @Date) - 1, 0) --previous_month_bom
	,previous_month_eom =	dateadd(day, -1, dateadd(month, datediff(month, 0, @Date), 0)) -- previous_month_eom 
	,bom =					      dateadd(month, datediff(month, 0, @Date), 0) -- bom 
	,eom =					      dateadd(month, datediff(month, 0, @Date) + 1, -1) -- eom 
	,next_bom =			    	dateadd(month, datediff(month, 0, @Date) + 1, 0) -- next_bom 
	,next_eom =				    dateadd(day, -1, dateadd(month, datediff(month, 0, @Date) + 2, 0)) -- next_eom